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ALSA-2025:4049 — Moderate: libtasn1 security update

Affected: AlmaLinux:8: libtasn1, AlmaLinux:8: libtasn1-devel, AlmaLinux:8: libtasn1-tools

A library that provides Abstract Syntax Notation One (ASN.1, as specified by the X.680 ITU-T recommendation) parsing and structures management, and Distinguished Encoding Rules (DER, as per X.690) encoding and decoding functions.

Security Fix(es):

* libtasn1: Inefficient DER Decoding in libtasn1 Leading to Potential Remote DoS (CVE-2024-12133)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2025-12052

BELL-CVE-2024-12133

Affected: Alpaquita:23: libtasn1, Alpaquita:stream: libtasn1

certfr-2025-avi-0492 — De multiples vulnérabilités ont été découvertes dans les produits Siemens. Certaines d'entre elles permettent à un atta…

certfr-2025-avi-0492

EUVD-2026-336274

fkie_cve-2024-12133

A flaw in libtasn1 causes inefficient handling of specific certificate data. When processing a large number of elements in a certificate, libtasn1 takes much longer than expected, which can slow down or even crash the system. This flaw allows an attacker to send a specially crafted certificate, causing a denial of service attack.

GHSA-j3qr-8f3v-fgjj

ICSA-25-162-05 — Siemens SIMATIC S7-1500 CPU family

sshd in OpenSSH 6.2 through 8.x before 8.8, when certain non-default configurations are used, allows privilege escalation because supplemental groups are not initialized as expected. Helper programs for AuthorizedKeysCommand and AuthorizedPrincipalsCommand may run with privileges associated with group memberships of the sshd process, if the configuration specifies running the command as a different user. A flaw was found in glibc. When the getaddrinfo function is called with the AF_UNSPEC address family and the system is configured with no-aaaa mode via /etc/resolv.conf, a DNS response via TCP larger than 2048 bytes can potentially disclose stack contents through the function returned address data, and may cause a crash. A flaw was found in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the _nss_*_gethostbyname2_r and _nss_*_getcanonname_r hooks without implementing the _nss_*_gethostbyname3_r hook. The resolved name should return a large number of IPv6 and IPv4, and the call to the getaddrinfo function should have the AF_INET6 address family with AI_CANONNAME, AI_ALL and AI_V4MAPPED as flags. A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment var…

msrc_CVE-2024-12133 — Libtasn1: inefficient der decoding in libtasn1 leading to potential remote dos

msrc_CVE-2024-12133

NCSC-2026-0022 — Kwetsbaarheden verholpen in Oracle Communications producten

NCSC-2026-0022

OESA-2025-1107 — libtasn1 security update

Affected: openEuler:22.03-LTS-SP4: libtasn1, openEuler:24.03-LTS: libtasn1, openEuler:24.03-LTS-SP1: libtasn1, openEuler:20.03-LTS-SP4: libtasn1, openEuler:22.03-LTS-SP3: libtasn1

Libtasn1 is the ASN.1 library used by GnuTLS, p11-kit and some other packages. The goal of this implementation is to be highly portable, and only require an ANSI C99 platform.This library provides Abstract Syntax Notation One (ASN.1, as specified by the X.680 ITU-T recommendation) parsing and structures management, and Distinguished Encoding Rules (DER, as per X.690) encoding and decoding functions. Security Fix(es):

openSUSE-SU-2025:14756-1 — libtasn1-6-32bit-4.20.0-1.1 on GA media

libtasn1-6-32bit-4.20.0-1.1 on GA media

RHSA-2025:17347 — Red Hat Security Advisory: libtasn1 security update

libtasn1: Inefficient DER Decoding in libtasn1 Leading to Potential Remote DoS

SSA-082556 — SSA-082556: Vulnerabilities in the additional GNU/Linux subsystem of the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP V3.1.5

Multiple vulnerabilities have been identified in the additional GNU/Linux subsystem of the firmware version V3.1.5 for the SIMATIC S7-1500 CPU 1518(F)-4 PN/DP MFP (incl. SIPLUS variant).

Siemens has released new versions for several affected products and recommends to update to the latest versions. Siemens is preparing further fix versions and recommends specific countermeasures for products where fixes are not, or not yet available.

Note: This SSA advises vulnerabilities for firmware version V3.1.5 only; for version V3.1.6 refer to SSA-019113.

SUSE-SU-2025:0512-1 — Security update for libtasn1

Security update for libtasn1

UBUNTU-CVE-2024-12133

Affected: Ubuntu:Pro:14.04:LTS: libtasn1-6, Ubuntu:Pro:16.04:LTS: libtasn1-6, Ubuntu:Pro:18.04:LTS: libtasn1-6, Ubuntu:20.04:LTS: libtasn1-6, Ubuntu:22.04:LTS: libtasn1-6, Ubuntu:24.04:LTS: libtasn1-6

VDE-2025-053 — Phoenix Contact: Multiple Vulnerabilities in PLCnext Firmware

Coreutils: heap overflow in split --line-bytes with very long lines Unprivileged overlay + shiftfs read access Nano: running `chmod` and `chown` on the filename allows malicious user to replace the emergency file with a malicious symlink to a root-owned file SSL_select_next_proto buffer overread Remote Code Execution in pypa/setuptools

WID-SEC-W-2025-0294 — libtasn1: Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libtasn1 ausnutzen, um einen Denial of Service Angriff durchzuführen.