USN-731-1: Apache vulnerabilities

10 March 2009

apache2 vulnerabilities

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

  • Ubuntu 8.04 LTS
  • Ubuntu 7.10
  • Ubuntu 6.06 LTS

Software Description

  • apache2

Details

It was discovered that Apache did not sanitize the method specifier header from an HTTP request when it is returned in an error message, which could result in browsers becoming vulnerable to cross-site scripting attacks when processing the output. With cross-site scripting vulnerabilities, if a user were tricked into viewing server output during a crafted server request, a remote attacker could exploit this to modify the contents, or steal confidential data (such as passwords), within the same domain. This issue only affected Ubuntu 6.06 LTS and 7.10. (CVE-2007-6203)

It was discovered that Apache was vulnerable to a cross-site request forgery (CSRF) in the mod_proxy_balancer balancer manager. If an Apache administrator were tricked into clicking a link on a specially crafted web page, an attacker could trigger commands that could modify the balancer manager configuration. This issue only affected Ubuntu 7.10 and 8.04 LTS. (CVE-2007-6420)

It was discovered that Apache had a memory leak when using mod_ssl with compression. A remote attacker could exploit this to exhaust server memory, leading to a denial of service. This issue only affected Ubuntu 7.10. (CVE-2008-1678)

It was discovered that in certain conditions, Apache did not specify a default character set when returning certain error messages containing UTF-7 encoded data, which could result in browsers becoming vulnerable to cross-site scripting attacks when processing the output. This issue only affected Ubuntu 6.06 LTS and 7.10. (CVE-2008-2168)

It was discovered that when configured as a proxy server, Apache did not limit the number of forwarded interim responses. A malicious remote server could send a large number of interim responses and cause a denial of service via memory exhaustion. (CVE-2008-2364)

It was discovered that mod_proxy_ftp did not sanitize wildcard pathnames when they are returned in directory listings, which could result in browsers becoming vulnerable to cross-site scripting attacks when processing the output. (CVE-2008-2939)

Update instructions

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

Ubuntu 8.04 LTS
apache2-mpm-event - 2.2.8-1ubuntu0.5
apache2-mpm-perchild - 2.2.8-1ubuntu0.5
apache2-mpm-prefork - 2.2.8-1ubuntu0.5
apache2-mpm-worker - 2.2.8-1ubuntu0.5
apache2.2-common - 2.2.8-1ubuntu0.5
Ubuntu 7.10
apache2-mpm-event - 2.2.4-3ubuntu0.2
apache2-mpm-perchild - 2.2.4-3ubuntu0.2
apache2-mpm-prefork - 2.2.4-3ubuntu0.2
apache2-mpm-worker - 2.2.4-3ubuntu0.2
apache2.2-common - 2.2.4-3ubuntu0.2
Ubuntu 6.06 LTS
apache2-common - 2.0.55-4ubuntu2.4
apache2-mpm-perchild - 2.0.55-4ubuntu2.4
apache2-mpm-prefork - 2.0.55-4ubuntu2.4
apache2-mpm-worker - 2.0.55-4ubuntu2.4

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

In general, a standard system upgrade is sufficient to effect the necessary changes.

References