mod_dav_svn, subversion security update

CentOS Errata and Security Advisory CESA-2013:0737

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.

A NULL pointer dereference flaw was found in the way the mod_dav_svn module
handled PROPFIND requests on activity URLs. A remote attacker could use
this flaw to cause the httpd process serving the request to crash.
(CVE-2013-1849)

A flaw was found in the way the mod_dav_svn module handled large numbers
of properties (such as those set with the “svn propset” command). A
malicious, remote user could use this flaw to cause the httpd process
serving the request to consume an excessive amount of system memory.
(CVE-2013-1845)

Two NULL pointer dereference flaws were found in the way the mod_dav_svn
module handled LOCK requests on certain types of URLs. A malicious, remote
user could use these flaws to cause the httpd process serving the request
to crash. (CVE-2013-1846, CVE-2013-1847)

Note: The CVE-2013-1849, CVE-2013-1846, and CVE-2013-1847 issues only
caused a temporary denial of service, as the Apache HTTP Server started a
new process to replace the crashed child process. When using prefork MPM,
the crash only affected the attacker. When using worker (threaded) MPM, the
connections of other users may have been interrupted.

Red Hat would like to thank the Apache Subversion project for reporting
these issues. Upstream acknowledges Alexander Klink as the original
reporter of CVE-2013-1845; Ben Reser as the original reporter of
CVE-2013-1846; and Philip Martin and Ben Reser as the original reporters of
CVE-2013-1847.

All subversion users should upgrade to these updated packages, which
contain backported patches to correct these issues. After installing the
updated packages, you must restart the httpd daemon, if you are using
mod_dav_svn, for the update to take effect.

Merged security bulletin from advisories:
https://lists.centos.org/pipermail/centos-announce/2013-April/081849.html
https://lists.centos.org/pipermail/centos-announce/2013-April/081850.html

Affected packages:
mod_dav_svn
subversion
subversion-devel
subversion-gnome
subversion-javahl
subversion-kde
subversion-perl
subversion-ruby
subversion-svn2cl

Upstream details at:
https://access.redhat.com/errata/RHSA-2013:0737