OESA-2023-1357 (CVE-2023-31130)

Vulnerability from osv_openeuler – Published: 2023-06-17 11:05 – Updated: 2026-08-06 11:05 – Source website
VLAI
Summary
c-ares security update
Details

Security Fix(es):

c-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular "0::00:00:00/2" was found to cause an issue. C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1. (CVE-2023-31130)

c-ares is an asynchronous resolver library. When /dev/urandom or RtlGenRandom() are unavailable, c-ares uses rand() to generate random numbers used for DNS query ids. This is not a CSPRNG, and it is also not seeded by srand() so will generate predictable output. Input from the random number generator is fed into a non-compilant RC4 implementation and may not be as strong as the original RC4 implementation. No attempt is made to look for modern OS-provided CSPRNGs like arc4random() that is widely available. This issue has been fixed in version 1.19.1.(CVE-2023-31147)

Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "aarch64": [
          "c-ares-1.16.1-7.oe1.aarch64.rpm",
          "c-ares-debugsource-1.16.1-7.oe1.aarch64.rpm",
          "c-ares-debuginfo-1.16.1-7.oe1.aarch64.rpm",
          "c-ares-devel-1.16.1-7.oe1.aarch64.rpm"
        ],
        "noarch": [
          "c-ares-help-1.16.1-7.oe1.noarch.rpm"
        ],
        "src": [
          "c-ares-1.16.1-7.oe1.src.rpm"
        ],
        "x86_64": [
          "c-ares-devel-1.16.1-7.oe1.x86_64.rpm",
          "c-ares-debuginfo-1.16.1-7.oe1.x86_64.rpm",
          "c-ares-1.16.1-7.oe1.x86_64.rpm",
          "c-ares-debugsource-1.16.1-7.oe1.x86_64.rpm"
        ]
      },
      "package": {
        "ecosystem": "openEuler:20.03-LTS-SP1",
        "name": "c-ares",
        "purl": "pkg:rpm/openEuler/c-ares\u0026distro=openEuler-20.03-LTS-SP1"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.16.1-7.oe1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "severity": "Medium"
  },
  "details": "\n\nSecurity Fix(es):\n\nc-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular \u0026quot;0::00:00:00/2\u0026quot; was found to cause an issue.  C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1.\n(CVE-2023-31130)\n\nc-ares is an asynchronous resolver library. When /dev/urandom or RtlGenRandom() are unavailable, c-ares uses rand() to generate random numbers used for DNS query ids. This is not a CSPRNG, and it is also not seeded by srand() so will generate predictable output. Input from the random number generator is fed into a non-compilant RC4 implementation and may not be as strong as the original RC4 implementation. No attempt is made to look for modern OS-provided CSPRNGs like arc4random() that is widely available. This issue has been fixed in version 1.19.1.(CVE-2023-31147)",
  "id": "OESA-2023-1357",
  "modified": "2026-08-06T11:05:49Z",
  "published": "2023-06-17T11:05:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1357"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-31130"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-31147"
    }
  ],
  "schema_version": "1.7.2",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "c-ares security update",
  "upstream": [
    "CVE-2023-31130",
    "CVE-2023-31147"
  ]
}



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