VDB
DEBIAN-CVE-2023-31147
DEBIAN-CVE-2023-31147
PUBLISHED
CVSS 6.5 MEDIUM
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.
Risk Scores
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian:12 | c-ares | 1.30.0-1, 1.32.2-1, 1.32.2-2 |
| Debian:13 | c-ares | 0, 0, 0 |
| Debian:11 | c-ares | 1.28.1-1, 1.30.0-1, 1.31.0-1 |
| Debian:14 | c-ares | 0, 0, 0 |
Timeline
- May 25, 2023 CVE Published
- Apr 28, 2026 CVE Updated