CVE-2023-31147
c-ares is an asynchronous resolver library.
Does this matter?
Lower severity and a low EPSS score (0.91%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
- EPSS
- 0.91% probability · 58th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-330
- Affected
- c-ares project/c-ares · fedoraproject/fedora
- Source
- security-advisories@github.com
References
- https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1Release Notes
- https://github.com/c-ares/c-ares/security/advisories/GHSA-8r8p-23f3-64c2Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202310-09Third Party Advisory
- https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1Release Notes
- https://github.com/c-ares/c-ares/security/advisories/GHSA-8r8p-23f3-64c2Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/B5Z5XFNXTNPTCBBVXFDNZQVLLIE6VRBY/Mailing List, Third Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UBFWILTA33LOSV23P44FGTQQIDRJHIY7/Mailing List, Third Party Advisory
- https://security.gentoo.org/glsa/202310-09Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.