Vulnerability-Lookup

CVE-2024-38528 (GCVE-0-2024-38528)

Vulnerability from cvelistv5 – Published: 2024-06-28 19:28 – Updated: 2024-08-02 04:12

Title

Unlimited number of NTS-KE connections can crash ntpd-rs server

Summary

nptd-rs is a tool for synchronizing your computer's clock, implementing the NTP and NTS protocols. There is a missing limit for accepted NTS-KE connections. This allows an unauthenticated remote attacker to crash ntpd-rs when an NTS-KE server is configured. Non NTS-KE server configurations, such as the default ntpd-rs configuration, are unaffected. This vulnerability has been patched in version 1.1.3.

Severity

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-07-01 17:42 UTC

CWE

CWE-770 - Allocation of Resources Without Limits or Throttling

Assigner

GitHub_M mitre root Scorecard

References

1 reference

URL	Tags
https://github.com/pendulum-project/ntpd-rs/secur…	x_refsource_CONFIRM

Impacted products

2 products

Vendor	Product	Version
pendulum-project	ntpd-rs	Affected: >= 0.3.1, <= 1.1.2
tweedegolf	ntpd-rs	Affected: 0.3.1 , ≤ 1.1.2 (custom) cpe:2.3:a:tweedegolf:ntpd-rs:0.3.1:::::rust::

Show details on NVD website

JSON

To clipboard

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EUVD-2026-6050

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 05:56

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

JSON

To clipboard

{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T05:56:18.411163+00:00",
  "id": "EUVD-2026-6050"
}

FKIE_CVE-2024-38528

Vulnerability from fkie_nvd - Published: 2024-06-28 20:15 - Updated: 2026-06-17 07:40

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-2xpx-vcmq-5f72
	af854a3a-2127-422b-91ae-364da2661108	https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-2xpx-vcmq-5f72

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "vendor": "pendulum-project",
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GHSA-2XPX-VCMQ-5F72

Vulnerability from github – Published: 2024-06-28 21:05 – Updated: 2024-07-02 02:26

Summary

Unlimited number of NTS-KE connections can crash ntpd-rs server

Details

Summary

Missing limit for accepted NTS-KE connections allows an unauthenticated remote attacker to crash ntpd-rs when an NTS-KE server is configured. Non NTS-KE server configurations, such as the default ntpd-rs configuration, are unaffected.

Details

Operating systems have a limit for the number of open file descriptors (which includes sockets) in a single process, e.g. 1024 on Linux by default. When ntpd-rs is configured as an NTS server, it accepts TCP connections for the NTS-KE service. If the process has reached the descriptor limit and tries to accept a new TCP connection, the accept() system call will return with the EMFILE error and cause ntpd-rs to abort.

A remote attacker can open a large number of parallel TCP connections to the server to trigger this crash. The connections need to be opened quickly enough to avoid the key-exchange-timeout-ms timeout (by default 1000 milliseconds).

Impact

Only NTS-KE server configuration are affected. Those without an NTS-KE server configuration such as NTS client only or NTP only configuration are unaffected. For affected configurations the ntpd-rs daemon can made completely unavailable by crashing the service. If ntpd-rs is automatically restarted, an attacker can repeat the attack to prevent ntpd-rs from doing anything useful.

Workarounds

Disable NTS-KE server functionality
Increase system resource limits (RLIMIT_NOFILE) to make the attack more difficult
Lower the key-exchange-timeout-ms configuration setting to make the attack more difficult

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

8.7 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Show details on source website

JSON

To clipboard

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  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 1.1.2"
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "ntpd"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.3.1"
            },
            {
              "fixed": "1.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-38528"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-770"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-06-28T21:05:52Z",
    "nvd_published_at": "2024-06-28T20:15:02Z",
    "severity": "HIGH"
  },
  "details": "### Summary\nMissing limit for accepted NTS-KE connections allows an unauthenticated remote attacker to crash ntpd-rs when an NTS-KE server is configured. Non NTS-KE server configurations, such as the default ntpd-rs configuration, are unaffected.\n\n### Details\nOperating systems have a limit for the number of open file descriptors (which includes sockets) in a single process, e.g. 1024 on Linux by default. When ntpd-rs is configured as an NTS server, it accepts TCP connections for the NTS-KE service. If the process has reached the descriptor limit and tries to accept a new TCP connection, the accept() system call will return with the EMFILE error and cause ntpd-rs to abort.\n\nA remote attacker can open a large number of parallel TCP connections to the server to trigger this crash. The connections need to be opened quickly enough to avoid the `key-exchange-timeout-ms` timeout (by default 1000 milliseconds).\n\n### Impact\nOnly NTS-KE server configuration are affected. Those without an NTS-KE server configuration such as NTS client only or NTP only configuration are unaffected. For affected configurations the ntpd-rs daemon can made completely unavailable by crashing the service. If ntpd-rs is automatically restarted, an attacker can repeat the attack to prevent ntpd-rs from doing anything useful.\n\n### Workarounds\n- Disable NTS-KE server functionality\n- Increase system resource limits (`RLIMIT_NOFILE`) to make the attack more difficult\n- Lower the `key-exchange-timeout-ms` configuration setting to make the attack more difficult",
  "id": "GHSA-2xpx-vcmq-5f72",
  "modified": "2024-07-02T02:26:15Z",
  "published": "2024-06-28T21:05:52Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-2xpx-vcmq-5f72"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38528"
    },
    {
      "type": "WEB",
      "url": "https://github.com/pendulum-project/ntpd-rs/commit/6049687006ea5b26eeac927964b5fcc80d7bde50"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pendulum-project/ntpd-rs"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Unlimited number of NTS-KE connections can crash ntpd-rs server"
}

OPENSUSE-SU-2024:0300-1

Vulnerability from csaf_opensuse - Published: 2024-09-11 10:01 - Updated: 2026-09-20 19:49

Summary

Security update for ntpd-rs

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2024-38528.

CVE-2024-38528

Recommended: 12 products

Open the full advisory

OPENSUSE-SU-2024:0331-1

Vulnerability from csaf_opensuse - Published: 2024-10-11 22:01 - Updated: 2026-09-20 19:49

Summary

Security update for ntpd-rs

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2024-38528.

CVE-2024-38528

Recommended: 12 products

Open the full advisory

OPENSUSE-SU-2024:14194-1

Vulnerability from csaf_opensuse - Published: 2024-07-15 00:00 - Updated: 2026-09-20 21:15

Summary

ntpd-rs-1.2.0-1.1 on GA media

Severity

Moderate

Scope

1 vulnerability in this advisory, including CVE-2024-38528.

CVE-2024-38528

Recommended: 8 products

Open the full advisory

UBUNTU-CVE-2024-38528 (CVE-2024-38528)

Vulnerability from osv_ubuntu – Published: 2024-06-28 20:15 – Updated: 2026-04-22 07:49 – Source website

Details

Severity

7.5 (High)


                    
                      CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2024-38528	REPORT
	https://www.cve.org/CVERecord?id=CVE-2024-38528	REPORT
	https://github.com/pendulum-project/ntpd-rs/secur…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "ntpd-rs",
            "binary_version": "1.1.2-1"
          },
          {
            "binary_name": "ntpd-rs-metrics",
            "binary_version": "1.1.2-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "rust-ntpd",
        "purl": "pkg:deb/ubuntu/rust-ntpd@1.1.2-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.0.0-5",
        "1.1.0-2",
        "1.1.0-3",
        "1.1.1-1",
        "1.1.1-2",
        "1.1.2-1"
      ]
    }
  ],
  "aliases": [],
  "details": "nptd-rs is a tool for synchronizing your computer\u0027s clock, implementing the NTP and NTS protocols. There is a missing limit for accepted NTS-KE connections. This allows an unauthenticated remote attacker to crash ntpd-rs when an NTS-KE server is configured. Non NTS-KE server configurations, such as the default ntpd-rs configuration, are unaffected. This vulnerability has been patched in version 1.1.3.",
  "id": "UBUNTU-CVE-2024-38528",
  "modified": "2026-04-22T07:49:22Z",
  "published": "2024-06-28T20:15:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2024-38528"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-38528"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/pendulum-project/ntpd-rs/security/advisories/GHSA-2xpx-vcmq-5f72"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2024-38528"
  ]
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2024-38528 (GCVE-0-2024-38528)

EUVD-2026-6050

FKIE_CVE-2024-38528

GHSA-2XPX-VCMQ-5F72

Summary

Details

Impact

Workarounds

OPENSUSE-SU-2024:0300-1

OPENSUSE-SU-2024:0331-1

OPENSUSE-SU-2024:14194-1

UBUNTU-CVE-2024-38528 (CVE-2024-38528)

Tags

Sightings

Nomenclature

Related by attack behaviour