CVE-2021-40438

Publication date 16 September 2021

Last updated 21 August 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

9.0 · Critical

Score breakdown

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.

Status

Package Ubuntu Release Status
apache2 22.04 LTS jammy
Fixed 2.4.48-3.1ubuntu2
21.10 impish
Fixed 2.4.48-3.1ubuntu2
21.04 hirsute
Fixed 2.4.46-4ubuntu1.3
20.04 LTS focal
Fixed 2.4.41-4ubuntu3.6
18.04 LTS bionic
Fixed 2.4.29-1ubuntu4.18
16.04 LTS xenial
14.04 LTS trusty
Not affected

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
apache2

Severity score breakdown

Parameter Value
Base score 9.0 · Critical
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