NetSight
IP …
critical9.8Known exploitedPublic exploit code

CVE-2021-42013

Apache HTTP Server Path Traversal Vulnerability

Exploited in the wild

This vulnerability is on a Known Exploited Vulnerabilities catalogue, added 2021-11-03. Federal due date: 2021-11-17.

Apply updates per vendor instructions.

Public exploit code

Working exploit or proof of concept code has been published for this vulnerability. Treat unpatched systems as at risk.

Impact

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.

Affected products

VendorProductAffected versions
ApacheHttp Server
Versions 2.4.49, 2.4.50
FedoraprojectFedora
Versions 34, 35
OracleInstantis Enterprisetrack
Versions 17.1, 17.2, 17.3
OracleJd Edwards Enterpriseone Tools
before 9.2.6.0
OracleSecure Backup
before 18.1.0.1.0
NetappCloud Backup
All versions

Weakness classification

CWE-22

References