Vulnerability CVE-2023-31147: Information
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.
Severity: MEDIUM (6.5) Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Fixed packages
Package name | Branch | Fixed in version | Version from repository | Errata ID | Task # | State |
|---|---|---|---|---|---|---|
| c-ares | sisyphus | 1.19.1-alt1 | 1.28.1-alt1 | ALT-PU-2023-4134-1 | 324326 | Fixed |
| c-ares | sisyphus_e2k | 1.28.1-alt1 | 1.28.1-alt1 | ALT-PU-2024-6354-1 | - | Fixed |
| c-ares | sisyphus_riscv64 | 1.19.1-alt1 | 1.28.1-alt1 | ALT-PU-2023-4219-1 | - | Fixed |
| c-ares | p10 | 1.19.1-alt1 | 1.26.0-alt1 | ALT-PU-2023-4623-3 | 325980 | Fixed |
| c-ares | c10f1 | 1.19.1-alt1 | 1.19.1-alt1 | ALT-PU-2023-5121-4 | 327797 | Fixed |
References to Advisories, Solutions, and Tools
Hyperlink | Resource |
|---|---|
| https://github.com/c-ares/c-ares/security/advisories/GHSA-8r8p-23f3-64c2 |
|
| https://github.com/c-ares/c-ares/releases/tag/cares-1_19_1 |
|
| 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 |
|