(RHSA-2011:0258) Moderate: subversion security update

Subversion (SVN) is a concurrent version control system which enables one
or more users to collaborate in developing and maintaining a hierarchy of
files and directories while keeping a history of all changes. The
mod_dav_svn module is used with the Apache HTTP Server to allow access to
Subversion repositories via HTTP.

An access restriction bypass flaw was found in the mod_dav_svn module. If
the SVNPathAuthz directive was set to “short_circuit”, certain access rules
were not enforced, possibly allowing sensitive repository data to be leaked
to remote users. Note that SVNPathAuthz is set to “On” by default.
(CVE-2010-3315)

A server-side memory leak was found in the Subversion server. If a
malicious, remote user performed “svn blame” or “svn log” operations on
certain repository files, it could cause the Subversion server to consume
a large amount of system memory. (CVE-2010-4644)

A NULL pointer dereference flaw was found in the way the mod_dav_svn module
processed certain requests. If a malicious, remote user issued a certain
type of request to display a collection of Subversion repositories on a
host that has the SVNListParentPath directive enabled, it could cause the
httpd process serving the request to crash. Note that SVNListParentPath is
not enabled by default. (CVE-2010-4539)

All Subversion users should upgrade to these updated packages, which
contain backported patches to correct these issues. After installing the
updated packages, the Subversion server must be restarted for the update
to take effect: restart httpd if you are using mod_dav_svn, or restart
svnserve if it is used.