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
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)
|
|
hirsute |
Released
(1.18.0-6ubuntu8.2)
|
|
impish |
Released
(1.18.0-6ubuntu9)
|
|
jammy |
Released
(1.18.0-6ubuntu9)
|
|
trusty |
Released
(1.4.6-1ubuntu3.9+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
upstream |
Needs triage
|
|
xenial |
Released
(1.10.3-0ubuntu0.16.04.5+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
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 |