CVE-2023-31147 (GCVE-0-2023-31147)
Vulnerability from cvelistv5
Published
2023-05-25 21:55
Modified
2025-02-13 16:49
Severity ?
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-330 - Use of Insufficiently Random Values
Summary
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.
References
Impacted products
Vendor Product Version
c-ares c-ares Version: < 1.19.1
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