CVE-2021-20231

NameCVE-2021-20231
DescriptionA flaw was found in gnutls. A use after free issue in client sending key_share extension may lead to memory corruption and other consequences.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
gnutls28 (PTS)jessie, jessie (lts)3.3.30-0+deb8u2fixed
stretch (security), stretch (lts), stretch3.5.8-5+deb9u6fixed
buster3.6.7-4+deb10u8fixed
buster (security)3.6.7-4+deb10u12fixed
bullseye3.7.1-5+deb11u4fixed
bullseye (security)3.7.1-5+deb11u3fixed
bookworm3.7.9-2+deb12u2fixed
trixie3.8.3-1fixed
sid3.8.3-1.1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
gnutls28sourcejessie(not affected)
gnutls28sourcestretch(not affected)
gnutls28sourcebuster3.6.7-4+deb10u7
gnutls28source(unstable)3.7.1-1

Notes

[stretch] - gnutls28 <not-affected> (Vulnerable code introduced later)
https://www.gnutls.org/security-new.html#GNUTLS-SA-2021-03-10
https://gitlab.com/gnutls/gnutls/-/issues/1151
[jessie] - gnutls28 <not-affected> (Vulnerable code introduced later)

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