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
Upstream
Released (1.9.3-2)
Ubuntu 21.04 (Hirsute Hippo)
Released (1.9.3-1ubuntu0.1)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1.9.2-2ubuntu0.20.04.1)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (0.0~r131-2ubuntu3.1)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (0.0~r131-2ubuntu2+esm1)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (0.0~r114-2ubuntu1+esm2)
Patches:
Upstream: https://github.com/lz4/lz4/commit/8301a21773ef61656225e264f4f06ae14462bca7