CVE-2021-23017

Published: 25 May 2021

A security issue in nginx resolver was identified, which might allow an attacker who is able to forge UDP packets from the DNS server to cause 1-byte memory overwrite, resulting in worker process crash or potential other impact.

Priority

Medium

Status

Package Release Status
nginx
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.04 (Hirsute Hippo)
Released (1.18.0-6ubuntu8.2)
Ubuntu 20.10 (Groovy Gorilla)
Released (1.18.0-6ubuntu2.2)
Ubuntu 20.04 LTS (Focal Fossa)
Released (1.18.0-0ubuntu1.2)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (1.14.0-0ubuntu1.9)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (1.10.3-0ubuntu0.16.04.5+esm1)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (1.4.6-1ubuntu3.9+esm2)
Patches:
Upstream: http://nginx.org/download/patch.2021.resolver.txt