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CVE-2021-3520

Published: 30 April 2021

There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

Priority

Medium

CVSS 3 base score: 9.8

Status

Package Release Status
lz4
Launchpad, Ubuntu, Debian
bionic
Released (0.0~r131-2ubuntu3.1)
focal
Released (1.9.2-2ubuntu0.20.04.1)
groovy
Released (1.9.2-2ubuntu0.20.10.1)
hirsute
Released (1.9.3-1ubuntu0.1)
impish Not vulnerable
(1.9.3-2)
jammy Not vulnerable
(1.9.3-2)
precise Does not exist

trusty
Released (0.0~r114-2ubuntu1+esm2)
upstream
Released (1.9.3-2)
xenial
Released (0.0~r131-2ubuntu2+esm1)
Patches:
upstream: https://github.com/lz4/lz4/commit/8301a21773ef61656225e264f4f06ae14462bca7