USN-1627-1: Apache HTTP Server vulnerabilities

Ubuntu Security Notice USN-1627-1

8th November, 2012

apache2 vulnerabilities

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

  • Ubuntu 12.10
  • Ubuntu 12.04 LTS
  • Ubuntu 11.10
  • 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 mod_negotiation module incorrectly handled
certain filenames, 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. (CVE-2012-2687)

It was discovered that the Apache HTTP Server was vulnerable to the "CRIME"
SSL data compression attack. Although this issue had been mitigated on the
client with newer web browsers, this update also disables SSL data
compression on the server. A new SSLCompression directive for Apache has
been backported that may be used to re-enable SSL data compression in
certain environments. For more information, please refer to:
http://httpd.apache.org/docs/2.4/mod/mod_ssl.html#sslcompression
(CVE-2012-4929)

Update instructions

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

Ubuntu 12.10:
apache2.2-common 2.2.22-6ubuntu2.1
Ubuntu 12.04 LTS:
apache2.2-common 2.2.22-1ubuntu1.2
Ubuntu 11.10:
apache2.2-common 2.2.20-1ubuntu1.3
Ubuntu 10.04 LTS:
apache2.2-common 2.2.14-5ubuntu8.10
Ubuntu 8.04 LTS:
apache2.2-common 2.2.8-1ubuntu0.24

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

CVE-2012-2687, CVE-2012-4929