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CVE-2021-40438

Published: 16 September 2021

A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.

Priority

Medium

Cvss 3 Severity Score

9.0

Score breakdown

Status

Package Release Status
apache2
Launchpad, Ubuntu, Debian
impish
Released (2.4.48-3.1ubuntu2)
upstream
Released (2.4.49-1)
trusty Not vulnerable
(code not present)
xenial
Released (2.4.18-2ubuntu3.17+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
bionic
Released (2.4.29-1ubuntu4.18)
focal
Released (2.4.41-4ubuntu3.6)
hirsute
Released (2.4.46-4ubuntu1.3)
jammy
Released (2.4.48-3.1ubuntu2)
Patches:
upstream: https://github.com/apache/httpd/commit/d4901cb32133bc0e59ad193a29d1665597080d67

Severity score breakdown

Parameter Value
Base score 9.0
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H