Vulnerability-Lookup

OESA-2024-2021 (CVE-2024-25629)

Vulnerability from osv_openeuler – Published: 2024-08-23 11:07 – Updated: 2026-08-06 11:07 – Source website

Summary

c-ares security update

Details

This is c-ares, an asynchronous resolver library. It is intended for applications which need to perform DNS queries without blocking, or need to perform multiple

Security Fix(es):

c-ares is a C library for asynchronous DNS requests. ares__read_line() is used to parse local configuration files such as /etc/resolv.conf, /etc/nsswitch.conf, the HOSTALIASES file, and if using a c-ares version prior to 1.27.0, the /etc/hosts file. If any of these configuration files has an embedded NULL character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.(CVE-2024-25629)

Severity

4.4 (Medium)


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

References

URL

Type

	https://www.openeuler.org/zh/security/security-bu…	ADVISORY
	https://nvd.nist.gov/vuln/detail/CVE-2024-25629	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "c-ares-1.16.1-9.oe2003sp4.aarch64.rpm",
          "c-ares-debuginfo-1.16.1-9.oe2003sp4.aarch64.rpm",
          "c-ares-debugsource-1.16.1-9.oe2003sp4.aarch64.rpm",
          "c-ares-devel-1.16.1-9.oe2003sp4.aarch64.rpm"
        ],
        "noarch": [
          "c-ares-help-1.16.1-9.oe2003sp4.noarch.rpm"
        ],
        "src": [
          "c-ares-1.16.1-9.oe2003sp4.src.rpm"
        ],
        "x86_64": [
          "c-ares-1.16.1-9.oe2003sp4.x86_64.rpm",
          "c-ares-debuginfo-1.16.1-9.oe2003sp4.x86_64.rpm",
          "c-ares-debugsource-1.16.1-9.oe2003sp4.x86_64.rpm",
          "c-ares-devel-1.16.1-9.oe2003sp4.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP4",
        "name": "c-ares",
        "purl": "pkg:rpm/openEuler/c-ares\u0026distro=openEuler-20.03-LTS-SP4"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16.1-9.oe2003sp4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "This is c-ares, an asynchronous resolver library. It is intended for applications which need to perform DNS queries without blocking, or need to perform multiple\r\n\r\nSecurity Fix(es):\r\n\r\nc-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.(CVE-2024-25629)",
  "id": "OESA-2024-2021",
  "modified": "2026-08-06T11:07:29Z",
  "published": "2024-08-23T11:07:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2024-2021"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-25629"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "c-ares security update",
  "upstream": [
    "CVE-2024-25629"
  ]
}

CVE-2024-25629 (GCVE-0-2024-25629)

Vulnerability from cvelistv5 – Published: 2024-02-23 14:52 – Updated: 2025-02-13 17:40

Title

c-ares out of bounds read in ares__read_line()

Summary

c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.

Severity

4.4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-02-23 19:18 UTC

CWE

CWE-127 - Buffer Under-read

Assigner

GitHub_M mitre root

References

5 references

URL	Tags
https://github.com/c-ares/c-ares/security/advisor…	x_refsource_CONFIRM
https://github.com/c-ares/c-ares/commit/a804c04dd…	x_refsource_MISC
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…
https://lists.fedoraproject.org/archives/list/pac…

Impacted products

1 product

Vendor	Product	Version
c-ares	c-ares	Affected: < 1.27.0

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-25629",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-02-23T19:18:11.897134Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:35:14.331Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-01T23:44:09.807Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "name": "https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q",
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q"
          },
          {
            "name": "https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183",
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GX37LFPFQ3T6FFMMFYQTEGIQXXN7F27U/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2P76QYINQNPEHUTEEDOUYIRZ2X6UVZ5K/"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CSCMTSPDIE2UHU34TIXQQHZ6JTE3Y3VF/"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "c-ares",
          "vendor": "c-ares",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.27.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "c-ares is a C library for asynchronous DNS requests. `ares__read_line()` is used to parse local configuration files such as `/etc/resolv.conf`, `/etc/nsswitch.conf`, the `HOSTALIASES` file, and if using a c-ares version prior to 1.27.0, the `/etc/hosts` file. If any of these configuration files has an embedded `NULL` character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 4.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-127",
              "description": "CWE-127: Buffer Under-read",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-04-19T23:06:15.852Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/c-ares/c-ares/security/advisories/GHSA-mg26-v6qh-x48q"
        },
        {
          "name": "https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/c-ares/c-ares/commit/a804c04ddc8245fc8adf0e92368709639125e183"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GX37LFPFQ3T6FFMMFYQTEGIQXXN7F27U/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/2P76QYINQNPEHUTEEDOUYIRZ2X6UVZ5K/"
        },
        {
          "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CSCMTSPDIE2UHU34TIXQQHZ6JTE3Y3VF/"
        }
      ],
      "source": {
        "advisory": "GHSA-mg26-v6qh-x48q",
        "discovery": "UNKNOWN"
      },
      "title": "c-ares out of bounds read in ares__read_line()"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2024-25629",
    "datePublished": "2024-02-23T14:52:24.967Z",
    "dateReserved": "2024-02-08T22:26:33.512Z",
    "dateUpdated": "2025-02-13T17:40:51.243Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.

Detection rules are retrieved from Rulezet.

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.

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