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CVE-2021-4209

Published: 22 February 2022

A NULL pointer dereference flaw was found in GnuTLS. As Nettle's hash update functions internally call memcpy, providing zero-length input may cause undefined behavior. This flaw leads to a denial of service after authentication in rare circumstances.

Priority

Low

CVSS 3 base score: 6.5

Status

Package Release Status
gnutls26
Launchpad, Ubuntu, Debian
bionic Does not exist

cosmic Does not exist

disco Does not exist

eoan Does not exist

focal Does not exist

groovy Does not exist

hirsute Does not exist

impish Does not exist

jammy Does not exist

kinetic Does not exist

precise Ignored
(end of ESM support, was needs-triage)
trusty Needs triage

upstream Needs triage

xenial Does not exist

gnutls28
Launchpad, Ubuntu, Debian
bionic
Released (3.5.18-1ubuntu1.6)
focal
Released (3.6.13-2ubuntu1.7)
impish Ignored
(reached end-of-life)
jammy Not vulnerable
(3.7.3-4ubuntu1)
kinetic Not vulnerable
(3.7.6-2ubuntu1)
trusty Ignored
(out of standard support)
upstream
Released (3.7.3)
xenial
Released (3.4.10-4ubuntu1.9+esm1)
Patches:
upstream: https://gitlab.com/gnutls/gnutls/-/commit/3db352734472d851318944db13be73da61300568