Apache 2.4.49 Path Traversal and RCE

Description

A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outside the expected document root. If files outside of the document root are not protected by “require all denied” these requests can succeed. If the mod_cgi module is enabled, an attacker can execute arbitrary commands on the server using this vulnerability.

Recommendation

Upgrade Apache HTTP server

References

• CVE-2021-41773
• CVE-2021-42013
• Apache HTTP Server
• OWASP 2017-A9
• OWASP 2021-A6
• CWE-22
• OWASP 2017-A5
• OWASP 2021-A1
• CWE-77
• OWASP 2017-A1
• OWASP 2021-A3