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==========================================================================
Ubuntu Security Notice USN-2721-1
August 20, 2015

subversion vulnerabilities
==========================================================================

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

- Ubuntu 15.04
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in Subversion.

Software Description:
- subversion: Advanced version control system

Details:

It was discovered that the Subversion mod_dav_svn module incorrectly
handled REPORT requests for a resource that does not exist. A remote
attacker could use this issue to cause the server to crash, resulting in a
denial of service. This issue only affected Ubuntu 12.04 LTS and Ubuntu
14.04 LTS. (CVE-2014-3580)

It was discovered that the Subversion mod_dav_svn module incorrectly
handled requests requiring a lookup for a virtual transaction name that
does not exist. A remote attacker could use this issue to cause the server
to crash, resulting in a denial of service. This issue only affected Ubuntu
14.04 LTS. (CVE-2014-8108)

Evgeny Kotkov discovered that the Subversion mod_dav_svn module incorrectly
handled large numbers of REPORT requests. A remote attacker could use this
issue to cause the server to crash, resulting in a denial of service. This
issue only affected Ubuntu 14.04 LTS and Ubuntu 15.04. (CVE-2015-0202)

Evgeny Kotkov discovered that the Subversion mod_dav_svn and svnserve
modules incorrectly certain crafted parameter combinations. A remote
attacker could use this issue to cause the server to crash, resulting in a
denial of service. (CVE-2015-0248)

Ivan Zhakov discovered that the Subversion mod_dav_svn module incorrectly
handled crafted v1 HTTP protocol request sequences. A remote attacker could
use this issue to spoof the svn:author property. (CVE-2015-0251)

C. Michael Pilato discovered that the Subversion mod_dav_svn module
incorrectly restricted anonymous access. A remote attacker could use this
issue to read hidden files via the path name. This issue only affected
Ubuntu 14.04 LTS and Ubuntu 15.04. (CVE-2015-3184)

C. Michael Pilato discovered that Subversion incorrectly handled path-based
authorization. A remote attacker could use this issue to obtain sensitive
path information. (CVE-2015-3187)

Update instructions:

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

Ubuntu 15.04:
  libapache2-svn                  1.8.10-5ubuntu1.1
  libsvn1                         1.8.10-5ubuntu1.1
  subversion                      1.8.10-5ubuntu1.1

Ubuntu 14.04 LTS:
  libapache2-svn                  1.8.8-1ubuntu3.2
  libsvn1                         1.8.8-1ubuntu3.2
  subversion                      1.8.8-1ubuntu3.2

Ubuntu 12.04 LTS:
  libapache2-svn                  1.6.17dfsg-3ubuntu3.5
  libsvn1                         1.6.17dfsg-3ubuntu3.5
  subversion                      1.6.17dfsg-3ubuntu3.5

In general, a standard system update will make all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-2721-1
  CVE-2014-3580, CVE-2014-8108, CVE-2015-0202, CVE-2015-0248,
  CVE-2015-0251, CVE-2015-3184, CVE-2015-3187

Package Information:
  https://launchpad.net/ubuntu/+source/subversion/1.8.10-5ubuntu1.1
  https://launchpad.net/ubuntu/+source/subversion/1.8.8-1ubuntu3.2
  https://launchpad.net/ubuntu/+source/subversion/1.6.17dfsg-3ubuntu3.5



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