Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

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

Cvss 3 Severity Score

7.7

Score breakdown

Status

Package Release Status
nginx
Launchpad, Ubuntu, Debian
bionic
Released (1.14.0-0ubuntu1.9)
focal
Released (1.18.0-0ubuntu1.2)
groovy
Released (1.18.0-6ubuntu2.2)
jammy
Released (1.18.0-6ubuntu9)
impish
Released (1.18.0-6ubuntu9)
trusty
Released (1.4.6-1ubuntu3.9+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (1.10.3-0ubuntu0.16.04.5+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
hirsute
Released (1.18.0-6ubuntu8.2)
upstream Needs triage

Patches:
upstream: http://nginx.org/download/patch.2021.resolver.txt

Severity score breakdown

Parameter Value
Base score 7.7
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact Low
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L