Insufficient randomness in generation of DNS query IDs in c-ares
Summary
Insufficient randomness in generation of DNS query IDs in c-ares
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) NVD GitHub Advisory OSV
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2023-31147 c-ares
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov
- advisory security.gentoo.org
- web github.com
- web lists.fedoraproject.org
- web lists.fedoraproject.org