USN-1368-1: Apache HTTP Server vulnerabilities
16 February 2012
apache2 vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
- Ubuntu 8.04 LTS
Summary
Several security issues were fixed in the Apache HTTP Server.
Software Description
- apache2 - Apache HTTP server
Details
It was discovered that the Apache HTTP Server incorrectly handled the SetEnvIf .htaccess file directive. An attacker having write access to a .htaccess file may exploit this to possibly execute arbitrary code. (CVE-2011-3607)
Prutha Parikh discovered that the mod_proxy module did not properly interact with the RewriteRule and ProxyPassMatch pattern matches in the configuration of a reverse proxy. This could allow remote attackers to contact internal webservers behind the proxy that were not intended for external exposure. (CVE-2011-4317)
Rainer Canavan discovered that the mod_log_config module incorrectly handled a certain format string when used with a threaded MPM. A remote attacker could exploit this to cause a denial of service via a specially- crafted cookie. This issue only affected Ubuntu 11.04 and 11.10. (CVE-2012-0021)
It was discovered that the Apache HTTP Server incorrectly handled certain type fields within a scoreboard shared memory segment. A local attacker could exploit this to to cause a denial of service. (CVE-2012-0031)
Norman Hippert discovered that the Apache HTTP Server incorrecly handled header information when returning a Bad Request (400) error page. A remote attacker could exploit this to obtain the values of certain HTTPOnly cookies. (CVE-2012-0053)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 11.10
- apache2.2-common - 2.2.20-1ubuntu1.2
- Ubuntu 11.04
- apache2.2-common - 2.2.17-1ubuntu1.5
- Ubuntu 10.10
- apache2.2-common - 2.2.16-1ubuntu3.5
- Ubuntu 10.04 LTS
- apache2.2-common - 2.2.14-5ubuntu8.8
- Ubuntu 8.04 LTS
- apache2.2-common - 2.2.8-1ubuntu0.23
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.