CVE-2023-27522

Publication date 7 March 2023

Last updated 4 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
apache2	23.04 lunar	Fixed 2.4.55-1ubuntu2
	22.10 kinetic	Fixed 2.4.54-2ubuntu1.2
	22.04 LTS jammy	Fixed 2.4.52-1ubuntu4.4
	20.04 LTS focal	Fixed 2.4.41-4ubuntu3.14
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

fixed by r1908094 in 2.4.x

Patch details

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

Package	Patch details
apache2	Upstream: d753ea7

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N