CVE-2020-1927

Publication date 2 April 2020

Last updated 18 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

In Apache HTTP Server 2.4.0 to 2.4.41, redirects configured with mod_rewrite that were intended to be self-referential might be fooled by encoded newlines and redirect instead to an an unexpected URL within the request URL.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
apache2	25.10 questing	Not affected
	25.04 plucky	Not affected
	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Not affected
	21.04 hirsute	Not affected
	20.10 groovy	Not affected
	20.04 LTS focal	Fixed 2.4.41-4ubuntu3.1
	19.10 eoan	Ignored end of life
	18.04 LTS bionic	Fixed 2.4.29-1ubuntu4.14
	16.04 LTS xenial	Fixed 2.4.18-2ubuntu3.17
	14.04 LTS trusty	Vulnerable

Patch details

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

Package	Patch details
apache2	Upstream: https://svn.apache.org/viewvc?view=revision&revision=1873905 Upstream: https://svn.apache.org/viewvc?view=revision&revision=1874191 Upstream: cd26218 Upstream: 40bf351

Severity score breakdown

Parameter	Value
Base score	6.1 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Changed
Confidentiality	Low
Integrity impact	Low
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

References

Related Ubuntu Security Notices (USN)

USN-4458-1
Apache HTTP Server vulnerabilities
13 August 2020