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

Cvss 3 Severity Score

9.0

Score breakdown

Status

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

References

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