USN-1096-1: Subversion vulnerability

29 March 2011

subversion vulnerability

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

  • Ubuntu 10.10
  • Ubuntu 10.04 LTS
  • Ubuntu 9.10
  • Ubuntu 8.04 LTS
  • Ubuntu 6.06 LTS


An attacker could send crafted input to the Subversion mod_dav_svn module for Apache and cause it to crash.

Software Description

  • subversion - Advanced version control system


Philip Martin discovered that the Subversion mod_dav_svn module for Apache did not properly handle certain requests containing a lock token. A remote attacker could use this flaw to cause the service to crash, leading to a denial of service.

Update instructions

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

Ubuntu 10.10
libapache2-svn - 1.6.12dfsg-1ubuntu1.2
Ubuntu 10.04 LTS
libapache2-svn - 1.6.6dfsg-2ubuntu1.2
Ubuntu 9.10
libapache2-svn - 1.6.5dfsg-1ubuntu1.2
Ubuntu 8.04 LTS
libapache2-svn - 1.4.6dfsg1-2ubuntu1.3
Ubuntu 6.06 LTS
libapache2-svn - 1.3.1-3ubuntu1.4

To update your system, please follow these instructions:

After a standard system update you need to restart any applications that use Subversion, such as Apache when using mod_dav_svn, to make all the necessary changes.