The remote host is missing an update to subversion announced via advisory USN-812-1.

The problem can be corrected by upgrading your system to the following package versions: Ubuntu 6.06 LTS: libsvn0 1.3.1-3ubuntu1.2 Ubuntu 8.04 LTS: libsvn1 1.4.6dfsg1-2ubuntu1.1 Ubuntu 8.10: libsvn1 1.5.1dfsg1-1ubuntu2.1 Ubuntu 9.04: libsvn1 1.5.4dfsg1-1ubuntu2.1 After a standard system upgrade you need to restart any applications that use Subversion, such as Apache when using mod_dav_svn, to effect the necessary changes. https://secure1.securityspace.com/smysecure/catid.html?in=USN-812-1

Matt Lewis discovered that Subversion did not properly sanitize its input when processing svndiff streams, leading to various integer and heap overflows. If a user or automated system processed crafted input, a remote attacker could cause a denial of service or potentially execute arbitrary code as the user processing the input.