Vulnerability Details CVE-2023-31147
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 26.5%
CVSS Severity
CVSS v3 Score 5.9
References
- https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1
- https://github.com/c-ares/c-ares/security/advisories/GHSA-8r8p-23f3-64c2
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/
- https://security.gentoo.org/glsa/202310-09
- https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1
- https://github.com/c-ares/c-ares/security/advisories/GHSA-8r8p-23f3-64c2
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/
- https://security.gentoo.org/glsa/202310-09
Products affected by CVE-2023-31147
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cpe:2.3:a:c-ares_project:c-ares:-
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cpe:2.3:a:c-ares_project:c-ares:1.0.0
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cpe:2.3:a:c-ares_project:c-ares:1.1.0
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cpe:2.3:a:c-ares_project:c-ares:1.10.0
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cpe:2.3:a:c-ares_project:c-ares:1.11.0
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cpe:2.3:a:c-ares_project:c-ares:1.12.0
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cpe:2.3:a:c-ares_project:c-ares:1.13.0
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cpe:2.3:a:c-ares_project:c-ares:1.14.0
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cpe:2.3:a:c-ares_project:c-ares:1.15.0
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cpe:2.3:a:c-ares_project:c-ares:1.16.0
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cpe:2.3:a:c-ares_project:c-ares:1.16.1
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cpe:2.3:a:c-ares_project:c-ares:1.17.0
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cpe:2.3:a:c-ares_project:c-ares:1.17.1
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cpe:2.3:a:c-ares_project:c-ares:1.17.2
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cpe:2.3:a:c-ares_project:c-ares:1.18.0
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cpe:2.3:a:c-ares_project:c-ares:1.18.1
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cpe:2.3:a:c-ares_project:c-ares:1.19.0
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cpe:2.3:a:c-ares_project:c-ares:1.2.0
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cpe:2.3:a:c-ares_project:c-ares:1.2.1
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cpe:2.3:a:c-ares_project:c-ares:1.3.0
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cpe:2.3:a:c-ares_project:c-ares:1.3.1
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cpe:2.3:a:c-ares_project:c-ares:1.3.2
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cpe:2.3:a:c-ares_project:c-ares:1.4.0
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cpe:2.3:a:c-ares_project:c-ares:1.5.0
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cpe:2.3:a:c-ares_project:c-ares:1.5.1
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cpe:2.3:a:c-ares_project:c-ares:1.5.2
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cpe:2.3:a:c-ares_project:c-ares:1.5.3
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cpe:2.3:a:c-ares_project:c-ares:1.6.0
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cpe:2.3:a:c-ares_project:c-ares:1.7.0
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cpe:2.3:a:c-ares_project:c-ares:1.7.1
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cpe:2.3:a:c-ares_project:c-ares:1.7.2
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cpe:2.3:a:c-ares_project:c-ares:1.7.3
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cpe:2.3:a:c-ares_project:c-ares:1.7.4
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cpe:2.3:a:c-ares_project:c-ares:1.7.5
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cpe:2.3:a:c-ares_project:c-ares:1.8.0
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cpe:2.3:a:c-ares_project:c-ares:1.9.0
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cpe:2.3:a:c-ares_project:c-ares:1.9.1
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cpe:2.3:o:fedoraproject:fedora:37
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cpe:2.3:o:fedoraproject:fedora:38