USN-3373-1: Apache HTTP Server vulnerabilities

31 July 2017

apache2 vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 ESM

Summary

Several security issues were fixed in Apache HTTP Server.

Software Description

  • apache2 - Apache HTTP server

Details

Emmanuel Dreyfus discovered that third-party modules using the ap_get_basic_auth_pw() function outside of the authentication phase may lead to authentication requirements being bypassed. This update adds a new ap_get_basic_auth_components() function for use by third-party modules. (CVE-2017-3167)

Vasileios Panopoulos discovered that the Apache mod_ssl module may crash when third-party modules call ap_hook_process_connection() during an HTTP request to an HTTPS port. (CVE-2017-3169)

Javier Jiménez discovered that the Apache HTTP Server incorrectly handled parsing certain requests. A remote attacker could possibly use this issue to cause the Apache HTTP Server to crash, resulting in a denial of service. (CVE-2017-7668)

ChenQin and Hanno Böck discovered that the Apache mod_mime module incorrectly handled certain Content-Type response headers. A remote attacker could possibly use this issue to cause the Apache HTTP Server to crash, resulting in a denial of service. (CVE-2017-7679)

David Dennerline and Régis Leroy discovered that the Apache HTTP Server incorrectly handled unusual whitespace when parsing requests, contrary to specifications. When being used in combination with a proxy or backend server, a remote attacker could possibly use this issue to perform an injection attack and pollute cache. This update may introduce compatibility issues with clients that do not strictly follow HTTP protocol specifications. A new configuration option “HttpProtocolOptions Unsafe” can be used to revert to the previous unsafe behaviour in problematic environments. (CVE-2016-8743)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04 ESM
apache2.2-bin - 2.2.22-1ubuntu1.12

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

In general, a standard system update will make all the necessary changes.

References