Security Alert (A21-09-16): Multiple Vulnerabilities in Apache HTTP Server

Description:

The Apache Software Foundation released a security update to address multiple vulnerabilities in the HTTP Server and its modules.  A remote attacker could exploit the vulnerabilities by sending a specially crafted request to the affected systems.

Affected Systems:

• Apache HTTP Server prior to version 2.4.49

Impact:

Depending on the vulnerability exploited, a successful exploitation could lead to denial of service, information disclosure, security restriction bypass or spoofing 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://www.hkcert.org/tc/security-bulletin/apache-http-server-multiple-vulnerabilities_20210920
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33193
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-34798
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-36160
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39275
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-40438