High Threat Security Alert (A21-10-07): Vulnerability in Apache HTTP Server

Description:

The Apache Software Foundation released a security update to address a vulnerability in the HTTP Server and its modules.  The issue affects only Apache 2.4.49 and 2.4.50 and not earlier versions.  A remote attacker could exploit the vulnerability by sending a specially crafted request to the affected systems.

Reports indicate that the vulnerability (CVE-2021-42013) is being exploited in the wild.  You are advised to take immediate action to patch your affected systems to mitigate the elevated risk of cyber attacks.

Affected Systems:

• Apache HTTP Server version 2.4.49 and 2.4.50

Impact:

Successful exploitation could lead to remote code execution on an affected system.

Recommendation:

The Apache Software Foundation has released new version of the product to address the issues and they can be downloaded at the following URL:

https://httpd.apache.org/download.cgi#apache24

More Information:

• https://httpd.apache.org/download.cgi#apache24
• https://httpd.apache.org/security/vulnerabilities_24.html#2.4.51
• https://www.hkcert.org/security-bulletin/apache-http-multiple-vulnerabilities_20210920
• https://us-cert.cisa.gov/ncas/current-activity/2021/10/07/apache-releases-http-server-version-2451-address-vulnerabilities
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42013