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72 vulnerabilities by ProFTPD
CVE-2026-63091 (GCVE-0-2026-63091)
Vulnerability from nvd – Published: 2026-07-20 14:22 – Updated: 2026-07-28 01:49 X_Open Source
VLAI
EPSS
VEX
Title
ProFTPD mod_sftp Signed Integer Overflow via SCP Size-Record Parser
Summary
ProFTPD before 1.3.9c and 1.3.10rc3 contains a signed integer overflow vulnerability in the mod_sftp module's SCP size-record parser that allows authenticated low-privilege attackers to bypass ASLR by sending a crafted file size value of UINT64_MAX, which results in a negative off_t value. Attackers can exploit the subsequent conversion to uint32_t, causing an approximately 4 GB requested read length and forcing the server to read beyond the end of the SSH channel data and write overread process memory into the uploaded file. In tested configurations, the disclosed data contains libc, libcrypto, and PIE pointers sufficient to derive their randomized base addresses, thereby bypassing ASLR and enabling reliable exploitation of memory corruption vulnerabilities in the same process.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 16:32 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd/blob/master/RE… | release-notes |
| https://github.com/proftpd/proftpd/releases/tag/v… | patchrelease-notes |
| https://github.com/proftpd/proftpd/releases/tag/v1.3.9c | patchrelease-notes |
| https://github.com/proftpd/proftpd/pull/2201 | issue-trackingpatch |
| https://github.com/proftpd/proftpd/commit/b9b7dde… | patch |
| https://www.vulncheck.com/advisories/proftpd-mod-… | third-party-advisory |
Impacted products
Date Public
2026-07-01 00:00
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CVE-2026-63090 (GCVE-0-2026-63090)
Vulnerability from nvd – Published: 2026-07-20 14:22 – Updated: 2026-07-28 01:49 X_Open Source
VLAI
EPSS
VEX
Title
ProFTPD mod_sftp Heap Buffer Overflow via SFTP Packet Reassembly
Summary
ProFTPD before 1.3.9c and 1.3.10rc3 contains a heap-based buffer overflow vulnerability in the mod_sftp module that allows authenticated low-privilege attackers to achieve arbitrary code execution by sending crafted SFTP packet fragments exceeding the 16 KB reassembly buffer in the fxp.c component. Attackers can supply oversized fragments to trigger an incorrectly conditioned reallocation, corrupt pool freelist metadata, overwrite the root_fs BSS global pointer to reference a fake filesystem struct, and redirect pr_fsio_stat() to system() via a crafted RENAME request.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 15:33 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd/blob/master/RE… | release-notes |
| https://github.com/proftpd/proftpd/releases/tag/v… | patchrelease-notes |
| https://github.com/proftpd/proftpd/releases/tag/v1.3.9c | patchrelease-notes |
| https://github.com/proftpd/proftpd/issues/2190 | issue-tracking |
| https://github.com/proftpd/proftpd/commit/4ee8701… | patch |
| https://www.vulncheck.com/advisories/proftpd-mod-… | third-party-advisory |
Impacted products
Date Public
2026-06-26 00:00
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CVE-2026-53994 (GCVE-0-2026-53994)
Vulnerability from nvd – Published: 2026-07-18 19:30 – Updated: 2026-07-28 01:49
VLAI
EPSS
VEX
Title
ProFTPD mod_sftp Heap Buffer Overflow via Unsigned Integer Underflow and Size Truncation
Summary
ProFTPD mod_sftp contains a heap-based buffer overflow reachable by an authenticated SFTP user. The fxp_packet_read() function accepts the attacker-supplied 32-bit big-endian SFTP packet length without a minimum sanity check. A value of 0 causes an unsigned subtraction elsewhere in the read path to underflow to approximately 4 GB. That oversized request reaches the core memory allocator, where the rounded size is computed in size_t but passed to new_block() as a 32-bit int; the low 32 bits of 0x100000000 are 0, so new_block() returns a small (~512-byte) block while the caller is told it received ~4 GB. The subsequent fill loop then streams attacker-controlled bytes past the end of the 544-byte allocation, producing an attacker-controlled heap buffer overflow. An authenticated user can crash the per-connection ProFTPD session child on demand with a single malformed SFTP packet (packet_len=0 followed by a body greater than approximately 544 bytes), producing reliable authenticated remote denial of service. Depending on heap layout and adjacent allocations, heap metadata corruption and further consequences beyond denial of service may be possible, though only denial of service is demonstrated by the supplied proof of concept.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 19:12 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd | product |
| https://github.com/proftpd/proftpd/commit/7342836… | patch |
| https://www.vulncheck.com/advisories/proftpd-mod-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ProFTPD Project | ProFTPD |
Affected:
0 , < 1.3.10
(git)
cpe:2.3:a:proftpd:proftpd:*:*:*:*:*:*:*:* |
Date Public
2026-07-18 00:00
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CVE-2026-35025 (GCVE-0-2026-35025)
Vulnerability from nvd – Published: 2026-06-24 13:21 – Updated: 2026-07-14 20:00 X_Open Source
VLAI
EPSS
VEX
Title
ProFTPD ACL Bypass via /proc/self/root Path Prefix in RNFR
Summary
ProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated FTP users to circumvent Directory ACL restrictions by prefixing paths with /proc/self/root in the RNFR command handler. Attackers can exploit the unresolved symlink components in dir_canonical_path() to cause dir_check() to perform lexical path comparisons that match no configured Directory block, enabling rename operations on files in DenyAll-protected directories and subsequent retrieval of those files. Mitigation: Sessions configured with DefaultRoot (chroot) are not affected, as chroot changes the directory to which /proc/self/root resolves.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-24 15:00 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd/issues/2170 | technical-description |
| http://www.proftpd.org/ | product |
| https://www.vulncheck.com/advisories/proftpd-acl-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ProFTPD Project | ProFTPD |
Affected:
0 , ≤ 1.3.9b
(custom)
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Date Public
2026-06-23 00:00
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CVE-2026-44331 (GCVE-0-2026-44331)
Vulnerability from nvd – Published: 2026-05-05 19:41 – Updated: 2026-05-06 15:25
VLAI
EPSS
VEX
Summary
In ProFTPD through 1.3.9a before 7666224, a SQL injection vulnerability in sqltab_fetch_clients_cb() in contrib/mod_wrap2_sql.c allows a remote attacker to inject arbitrary SQL commands via a crafted domain name that is accessed in a reverse DNS lookup. When "UseReverseDNS on" is enabled, the attacker-supplied hostname is passed unescaped into SQL queries. The character restrictions of DNS names may affect exploitability.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-06 15:22 UTC
CWE
- CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Assigner
References
Impacted products
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CVE-2026-42167 (GCVE-0-2026-42167)
Vulnerability from nvd – Published: 2026-04-28 00:00 – Updated: 2026-05-01 18:22
VLAI
EPSS
VEX
Summary
mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backend allows commands (e.g., COPY TO PROGRAM).
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-29 12:51 UTC
CWE
- CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Assigner
References
7 references
Impacted products
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CVE-2021-47865 (GCVE-0-2021-47865)
Vulnerability from nvd – Published: 2026-01-21 17:27 – Updated: 2026-04-07 14:06
VLAI
EPSS
VEX
Title
ProFTPD 1.3.7a - Remote Denial of Service
Summary
ProFTPD 1.3.7a contains a denial of service vulnerability that allows attackers to overwhelm the server by creating multiple simultaneous FTP connections. Attackers can repeatedly establish connections using threading to exhaust server connection limits and block legitimate user access.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-22 21:57 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/49697 | exploit |
| http://www.proftpd.org/ | product |
| https://github.com/proftpd/proftpd/issues/1298 | issue-tracking |
| https://www.vulncheck.com/advisories/proftpd-a-re… | third-party-advisory |
Impacted products
Date Public
2021-03-22 00:00
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CVE-2010-20103 (GCVE-0-2010-20103)
Vulnerability from nvd – Published: 2025-08-20 15:38 – Updated: 2026-07-15 01:23 X_Known Exploited Vulnerability
VLAI
EPSS
VEX
Title
ProFTPD 1.3.3c Backdoor Command Execution
Summary
A malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 28 and December 2, 2010. The backdoor implements a hidden FTP command trigger that, when invoked, causes the server to execute arbitrary shell commands with root privileges. This allows remote, unauthenticated attackers to run any OS command on the FTP server host.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-22 15:44 UTC
CWE
- CWE-912 - Hidden Functionality
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://web.archive.org/web/20111107212129/http:/… | vendor-advisorypatch |
| https://raw.githubusercontent.com/rapid7/metasplo… | exploit |
| https://www.exploit-db.com/exploits/15662 | exploit |
| https://www.exploit-db.com/exploits/16921 | exploit |
| https://advisories.checkpoint.com/defense/advisor… | third-party-advisory |
| https://github.com/proftpd/proftpd | product |
| http://www.proftpd.org/ | product |
| https://www.vulncheck.com/advisories/proftpd-back… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ProFTPD Project | ProFTPD (Professional FTP Daemon) |
Affected:
1.3.3c
cpe:2.3:a:proftpd:proftpd:1.3.3c:*:*:*:*:*:*:* |
Date Public
2010-12-02 00:00
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CVE-2024-48651 (GCVE-0-2024-48651)
Vulnerability from nvd – Published: 2024-11-29 00:00 – Updated: 2025-11-03 22:22
VLAI
EPSS
VEX
Summary
In ProFTPD through 1.3.8b before cec01cc, supplemental group inheritance grants unintended access to GID 0 because of the lack of supplemental groups from mod_sql.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-29 15:02 UTC
CWE
- n/a
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
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CVE-2023-51713 (GCVE-0-2023-51713)
Vulnerability from nvd – Published: 2023-12-22 00:00 – Updated: 2025-11-03 21:50
VLAI
EPSS
VEX
Summary
make_ftp_cmd in main.c in ProFTPD before 1.3.8a has a one-byte out-of-bounds read, and daemon crash, because of mishandling of quote/backslash semantics.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2023-48795 (GCVE-0-2023-48795)
Vulnerability from nvd – Published: 2023-12-18 00:00 – Updated: 2026-07-14 12:16
VLAI
EPSS
VEX
Summary
The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com MAC algorithms. This also affects Maverick Synergy Java SSH API before 3.1.0-SNAPSHOT, Dropbear through 2022.83, Ssh before 5.1.1 in Erlang/OTP, PuTTY before 0.80, AsyncSSH before 2.14.2, golang.org/x/crypto before 0.17.0, libssh before 0.10.6, libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7 before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0, TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before 14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before 9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for Node.js, the thrussh library before 0.35.1 for Rust, and the Russh crate before 0.40.2 for Rust.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2023-12-22 05:01 UTC
CWE
- n/a
- CWE-354 - Improper Validation of Integrity Check Value
Assigner
References
139 references
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | RUGGEDCOM APE1808 |
Affected:
0 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
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CVE-2021-46854 (GCVE-0-2021-46854)
Vulnerability from nvd – Published: 2022-11-23 00:00 – Updated: 2025-04-28 20:17
VLAI
EPSS
VEX
Summary
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-28 20:16 UTC
CWE
- n/a
- CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
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CVE-2020-9273 (GCVE-0-2020-9273)
Vulnerability from nvd – Published: 2020-02-20 15:22 – Updated: 2024-08-04 10:26
VLAI
EPSS
VEX
Summary
In ProFTPD 1.3.7, it is possible to corrupt the memory pool by interrupting the data transfer channel. This triggers a use-after-free in alloc_pool in pool.c, and possible remote code execution.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
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| https://github.com/proftpd/proftpd/issues/903 | x_refsource_CONFIRM |
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| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
| https://security.gentoo.org/glsa/202003-35 | vendor-advisoryx_refsource_GENTOO |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| http://www.openwall.com/lists/oss-security/2021/08/25/1 | mailing-listx_refsource_MLIST |
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CVE-2020-9272 (GCVE-0-2020-9272)
Vulnerability from nvd – Published: 2020-02-20 15:17 – Updated: 2024-08-04 10:26
VLAI
EPSS
VEX
Summary
ProFTPD 1.3.7 has an out-of-bounds (OOB) read vulnerability in mod_cap via the cap_text.c cap_to_text function.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd/blob/master/RE… | x_refsource_CONFIRM |
| https://github.com/proftpd/proftpd/issues/902 | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://security.gentoo.org/glsa/202003-35 | vendor-advisoryx_refsource_GENTOO |
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CVE-2019-19269 (GCVE-0-2019-19269)
Vulnerability from nvd – Published: 2019-11-26 03:34 – Updated: 2024-08-05 02:09
VLAI
EPSS
VEX
Summary
An issue was discovered in tls_verify_crl in ProFTPD through 1.3.6b. A dereference of a NULL pointer may occur. This pointer is returned by the OpenSSL sk_X509_REVOKED_value() function when encountering an empty CRL installed by a system administrator. The dereference occurs when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd/issues/861 | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2019… | mailing-listx_refsource_MLIST |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://security.gentoo.org/glsa/202003-35 | vendor-advisoryx_refsource_GENTOO |
| https://www.oracle.com/security-alerts/cpuapr2020.html | x_refsource_MISC |
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CVE-2019-19272 (GCVE-0-2019-19272)
Vulnerability from nvd – Published: 2019-11-26 03:33 – Updated: 2024-08-05 02:09
VLAI
EPSS
VEX
Summary
An issue was discovered in tls_verify_crl in ProFTPD before 1.3.6. Direct dereference of a NULL pointer (a variable initialized to NULL) leads to a crash when validating the certificate of a client connecting to the server in a TLS client/server mutual-authentication setup.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd/issues/858 | x_refsource_MISC |
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CVE-2026-63091 (GCVE-0-2026-63091)
Vulnerability from cvelistv5 – Published: 2026-07-20 14:22 – Updated: 2026-07-28 01:49 X_Open Source
VLAI
EPSS
VEX
Title
ProFTPD mod_sftp Signed Integer Overflow via SCP Size-Record Parser
Summary
ProFTPD before 1.3.9c and 1.3.10rc3 contains a signed integer overflow vulnerability in the mod_sftp module's SCP size-record parser that allows authenticated low-privilege attackers to bypass ASLR by sending a crafted file size value of UINT64_MAX, which results in a negative off_t value. Attackers can exploit the subsequent conversion to uint32_t, causing an approximately 4 GB requested read length and forcing the server to read beyond the end of the SSH channel data and write overread process memory into the uploaded file. In tested configurations, the disclosed data contains libc, libcrypto, and PIE pointers sufficient to derive their randomized base addresses, thereby bypassing ASLR and enabling reliable exploitation of memory corruption vulnerabilities in the same process.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-20 16:32 UTC
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd/blob/master/RE… | release-notes |
| https://github.com/proftpd/proftpd/releases/tag/v… | patchrelease-notes |
| https://github.com/proftpd/proftpd/releases/tag/v1.3.9c | patchrelease-notes |
| https://github.com/proftpd/proftpd/pull/2201 | issue-trackingpatch |
| https://github.com/proftpd/proftpd/commit/b9b7dde… | patch |
| https://www.vulncheck.com/advisories/proftpd-mod-… | third-party-advisory |
Impacted products
Date Public
2026-07-01 00:00
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CVE-2026-63090 (GCVE-0-2026-63090)
Vulnerability from cvelistv5 – Published: 2026-07-20 14:22 – Updated: 2026-07-28 01:49 X_Open Source
VLAI
EPSS
VEX
Title
ProFTPD mod_sftp Heap Buffer Overflow via SFTP Packet Reassembly
Summary
ProFTPD before 1.3.9c and 1.3.10rc3 contains a heap-based buffer overflow vulnerability in the mod_sftp module that allows authenticated low-privilege attackers to achieve arbitrary code execution by sending crafted SFTP packet fragments exceeding the 16 KB reassembly buffer in the fxp.c component. Attackers can supply oversized fragments to trigger an incorrectly conditioned reallocation, corrupt pool freelist metadata, overwrite the root_fs BSS global pointer to reference a fake filesystem struct, and redirect pr_fsio_stat() to system() via a crafted RENAME request.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-21 15:33 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd/blob/master/RE… | release-notes |
| https://github.com/proftpd/proftpd/releases/tag/v… | patchrelease-notes |
| https://github.com/proftpd/proftpd/releases/tag/v1.3.9c | patchrelease-notes |
| https://github.com/proftpd/proftpd/issues/2190 | issue-tracking |
| https://github.com/proftpd/proftpd/commit/4ee8701… | patch |
| https://www.vulncheck.com/advisories/proftpd-mod-… | third-party-advisory |
Impacted products
Date Public
2026-06-26 00:00
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CVE-2026-53994 (GCVE-0-2026-53994)
Vulnerability from cvelistv5 – Published: 2026-07-18 19:30 – Updated: 2026-07-28 01:49
VLAI
EPSS
VEX
Title
ProFTPD mod_sftp Heap Buffer Overflow via Unsigned Integer Underflow and Size Truncation
Summary
ProFTPD mod_sftp contains a heap-based buffer overflow reachable by an authenticated SFTP user. The fxp_packet_read() function accepts the attacker-supplied 32-bit big-endian SFTP packet length without a minimum sanity check. A value of 0 causes an unsigned subtraction elsewhere in the read path to underflow to approximately 4 GB. That oversized request reaches the core memory allocator, where the rounded size is computed in size_t but passed to new_block() as a 32-bit int; the low 32 bits of 0x100000000 are 0, so new_block() returns a small (~512-byte) block while the caller is told it received ~4 GB. The subsequent fill loop then streams attacker-controlled bytes past the end of the 544-byte allocation, producing an attacker-controlled heap buffer overflow. An authenticated user can crash the per-connection ProFTPD session child on demand with a single malformed SFTP packet (packet_len=0 followed by a body greater than approximately 544 bytes), producing reliable authenticated remote denial of service. Depending on heap layout and adjacent allocations, heap metadata corruption and further consequences beyond denial of service may be possible, though only denial of service is demonstrated by the supplied proof of concept.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-23 19:12 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd | product |
| https://github.com/proftpd/proftpd/commit/7342836… | patch |
| https://www.vulncheck.com/advisories/proftpd-mod-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ProFTPD Project | ProFTPD |
Affected:
0 , < 1.3.10
(git)
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Date Public
2026-07-18 00:00
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CVE-2026-35025 (GCVE-0-2026-35025)
Vulnerability from cvelistv5 – Published: 2026-06-24 13:21 – Updated: 2026-07-14 20:00 X_Open Source
VLAI
EPSS
VEX
Title
ProFTPD ACL Bypass via /proc/self/root Path Prefix in RNFR
Summary
ProFTPD through 1.3.9b and 1.3.10rc2 contains an access control bypass vulnerability that allows authenticated FTP users to circumvent Directory ACL restrictions by prefixing paths with /proc/self/root in the RNFR command handler. Attackers can exploit the unresolved symlink components in dir_canonical_path() to cause dir_check() to perform lexical path comparisons that match no configured Directory block, enabling rename operations on files in DenyAll-protected directories and subsequent retrieval of those files. Mitigation: Sessions configured with DefaultRoot (chroot) are not affected, as chroot changes the directory to which /proc/self/root resolves.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-24 15:00 UTC
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd/issues/2170 | technical-description |
| http://www.proftpd.org/ | product |
| https://www.vulncheck.com/advisories/proftpd-acl-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ProFTPD Project | ProFTPD |
Affected:
0 , ≤ 1.3.9b
(custom)
Affected: 0 , ≤ 1.3.10rc2 (custom) cpe:2.3:a:proftpd:proftpd:*:*:*:*:*:*:*:* cpe:2.3:a:proftpd:proftpd:*:*:*:*:*:*:*:* |
Date Public
2026-06-23 00:00
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CVE-2026-44331 (GCVE-0-2026-44331)
Vulnerability from cvelistv5 – Published: 2026-05-05 19:41 – Updated: 2026-05-06 15:25
VLAI
EPSS
VEX
Summary
In ProFTPD through 1.3.9a before 7666224, a SQL injection vulnerability in sqltab_fetch_clients_cb() in contrib/mod_wrap2_sql.c allows a remote attacker to inject arbitrary SQL commands via a crafted domain name that is accessed in a reverse DNS lookup. When "UseReverseDNS on" is enabled, the attacker-supplied hostname is passed unescaped into SQL queries. The character restrictions of DNS names may affect exploitability.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-06 15:22 UTC
CWE
- CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Assigner
References
Impacted products
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CVE-2026-42167 (GCVE-0-2026-42167)
Vulnerability from cvelistv5 – Published: 2026-04-28 00:00 – Updated: 2026-05-01 18:22
VLAI
EPSS
VEX
Summary
mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backend allows commands (e.g., COPY TO PROGRAM).
Severity
8.1 (High)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-29 12:51 UTC
CWE
- CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Assigner
References
7 references
Impacted products
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CVE-2021-47865 (GCVE-0-2021-47865)
Vulnerability from cvelistv5 – Published: 2026-01-21 17:27 – Updated: 2026-04-07 14:06
VLAI
EPSS
VEX
Title
ProFTPD 1.3.7a - Remote Denial of Service
Summary
ProFTPD 1.3.7a contains a denial of service vulnerability that allows attackers to overwhelm the server by creating multiple simultaneous FTP connections. Attackers can repeatedly establish connections using threading to exhaust server connection limits and block legitimate user access.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-22 21:57 UTC
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://www.exploit-db.com/exploits/49697 | exploit |
| http://www.proftpd.org/ | product |
| https://github.com/proftpd/proftpd/issues/1298 | issue-tracking |
| https://www.vulncheck.com/advisories/proftpd-a-re… | third-party-advisory |
Impacted products
Date Public
2021-03-22 00:00
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CVE-2010-20103 (GCVE-0-2010-20103)
Vulnerability from cvelistv5 – Published: 2025-08-20 15:38 – Updated: 2026-07-15 01:23 X_Known Exploited Vulnerability
VLAI
EPSS
VEX
Title
ProFTPD 1.3.3c Backdoor Command Execution
Summary
A malicious backdoor was embedded in the official ProFTPD 1.3.3c source tarball distributed between November 28 and December 2, 2010. The backdoor implements a hidden FTP command trigger that, when invoked, causes the server to execute arbitrary shell commands with root privileges. This allows remote, unauthenticated attackers to run any OS command on the FTP server host.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-08-22 15:44 UTC
CWE
- CWE-912 - Hidden Functionality
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://web.archive.org/web/20111107212129/http:/… | vendor-advisorypatch |
| https://raw.githubusercontent.com/rapid7/metasplo… | exploit |
| https://www.exploit-db.com/exploits/15662 | exploit |
| https://www.exploit-db.com/exploits/16921 | exploit |
| https://advisories.checkpoint.com/defense/advisor… | third-party-advisory |
| https://github.com/proftpd/proftpd | product |
| http://www.proftpd.org/ | product |
| https://www.vulncheck.com/advisories/proftpd-back… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ProFTPD Project | ProFTPD (Professional FTP Daemon) |
Affected:
1.3.3c
cpe:2.3:a:proftpd:proftpd:1.3.3c:*:*:*:*:*:*:* |
Date Public
2010-12-02 00:00
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CVE-2024-48651 (GCVE-0-2024-48651)
Vulnerability from cvelistv5 – Published: 2024-11-29 00:00 – Updated: 2025-11-03 22:22
VLAI
EPSS
VEX
Summary
In ProFTPD through 1.3.8b before cec01cc, supplemental group inheritance grants unintended access to GID 0 because of the lack of supplemental groups from mod_sql.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-11-29 15:02 UTC
CWE
- n/a
- CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
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CVE-2023-51713 (GCVE-0-2023-51713)
Vulnerability from cvelistv5 – Published: 2023-12-22 00:00 – Updated: 2025-11-03 21:50
VLAI
EPSS
VEX
Summary
make_ftp_cmd in main.c in ProFTPD before 1.3.8a has a one-byte out-of-bounds read, and daemon crash, because of mishandling of quote/backslash semantics.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2023-48795 (GCVE-0-2023-48795)
Vulnerability from cvelistv5 – Published: 2023-12-18 00:00 – Updated: 2026-07-14 12:16
VLAI
EPSS
VEX
Summary
The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com MAC algorithms. This also affects Maverick Synergy Java SSH API before 3.1.0-SNAPSHOT, Dropbear through 2022.83, Ssh before 5.1.1 in Erlang/OTP, PuTTY before 0.80, AsyncSSH before 2.14.2, golang.org/x/crypto before 0.17.0, libssh before 0.10.6, libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7 before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0, TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before 14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before 9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for Node.js, the thrussh library before 0.35.1 for Rust, and the Russh crate before 0.40.2 for Rust.
Severity
5.9 (Medium)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2023-12-22 05:01 UTC
CWE
- n/a
- CWE-354 - Improper Validation of Integrity Check Value
Assigner
References
139 references
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | RUGGEDCOM APE1808 |
Affected:
0 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
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"cveId": "CVE-2023-48795",
"datePublished": "2023-12-18T00:00:00.000Z",
"dateReserved": "2023-11-20T00:00:00.000Z",
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CVE-2021-46854 (GCVE-0-2021-46854)
Vulnerability from cvelistv5 – Published: 2022-11-23 00:00 – Updated: 2025-04-28 20:17
VLAI
EPSS
VEX
Summary
mod_radius in ProFTPD before 1.3.7c allows memory disclosure to RADIUS servers because it copies blocks of 16 characters.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-28 20:16 UTC
CWE
- n/a
- CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
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CVE-2020-9273 (GCVE-0-2020-9273)
Vulnerability from cvelistv5 – Published: 2020-02-20 15:22 – Updated: 2024-08-04 10:26
VLAI
EPSS
VEX
Summary
In ProFTPD 1.3.7, it is possible to corrupt the memory pool by interrupting the data transfer channel. This triggers a use-after-free in alloc_pool in pool.c, and possible remote code execution.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
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|---|---|
| https://github.com/proftpd/proftpd/blob/master/RE… | x_refsource_CONFIRM |
| https://github.com/proftpd/proftpd/issues/903 | x_refsource_CONFIRM |
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| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
| https://security.gentoo.org/glsa/202003-35 | vendor-advisoryx_refsource_GENTOO |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| http://www.openwall.com/lists/oss-security/2021/08/25/1 | mailing-listx_refsource_MLIST |
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CVE-2020-9272 (GCVE-0-2020-9272)
Vulnerability from cvelistv5 – Published: 2020-02-20 15:17 – Updated: 2024-08-04 10:26
VLAI
EPSS
VEX
Summary
ProFTPD 1.3.7 has an out-of-bounds (OOB) read vulnerability in mod_cap via the cap_text.c cap_to_text function.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/proftpd/proftpd/blob/master/RE… | x_refsource_CONFIRM |
| https://github.com/proftpd/proftpd/issues/902 | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://security.gentoo.org/glsa/202003-35 | vendor-advisoryx_refsource_GENTOO |
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"dateUpdated": "2024-08-04T10:26:15.945Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}