CVE-2023-31130

NameCVE-2023-31130
Descriptionc-ares is an asynchronous resolver library. ares_inet_net_pton() is vulnerable to a buffer underflow for certain ipv6 addresses, in particular "0::00:00:00/2" was found to cause an issue. C-ares only uses this function internally for configuration purposes which would require an administrator to configure such an address via ares_set_sortlist(). However, users may externally use ares_inet_net_pton() for other purposes and thus be vulnerable to more severe issues. This issue has been fixed in 1.19.1.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDLA-3471-1, DSA-5419-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
c-ares (PTS)buster1.14.0-1+deb10u1vulnerable
buster (security)1.14.0-1+deb10u4fixed
bullseye (security), bullseye1.17.1-1+deb11u3fixed
bookworm1.18.1-3fixed
sid, trixie1.31.0-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
c-aressourceexperimental1.19.1-1
c-aressourcebuster1.14.0-1+deb10u3DLA-3471-1
c-aressourcebullseye1.17.1-1+deb11u3DSA-5419-1
c-aressource(unstable)1.18.1-3

Notes

https://github.com/c-ares/c-ares/security/advisories/GHSA-x6mf-cxr9-8q6v
https://github.com/c-ares/c-ares/commit/f22cc01039b6473b736d3bf438f56a2654cdf2b2 (cares-1_19_1)

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