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CVE-2021-42013

Published: 7 October 2021

It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files outside the directories configured by Alias-like directives. If files outside of these directories are not protected by the usual default configuration "require all denied", these requests can succeed. If CGI scripts are also enabled for these aliased pathes, this could allow for remote code execution. This issue only affects Apache 2.4.49 and Apache 2.4.50 and not earlier versions.

Priority

High

CVSS 3 base score: 9.8

Status

Package Release Status
apache2
Launchpad, Ubuntu, Debian
bionic Not vulnerable

focal Not vulnerable

hirsute Not vulnerable

impish Not vulnerable

jammy Not vulnerable

trusty Not vulnerable

upstream Needs triage

xenial Not vulnerable