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==========================================================================
Ubuntu Security Notice USN-3388-2
October 24, 2017

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

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

- Ubuntu 12.04 ESM

Summary:

Several security issues were fixed in Subversion.

Software Description:
- subversion: Advanced version control system

Details:

USN-3388-1 fixed several vulnerabilities in Subversion. This update
provides the corresponding update for Ubuntu 12.04 ESM.

Ivan Zhakov discovered that Subversion did not properly handle
some requests. A remote attacker could use this to cause a
denial of service. (CVE-2016-2168)

Original advisory details:

 Joern Schneeweisz discovered that Subversion did not properly handle
 host names in 'svn+ssh://' URLs. A remote attacker could use this
 to construct a subversion repository that when accessed could run
 arbitrary code with the privileges of the user. (CVE-2017-9800)

 Daniel Shahaf and James McCoy discovered that Subversion did not
 properly verify realms when using Cyrus SASL authentication. A
 remote attacker could use this to possibly bypass intended access
 restrictions. (CVE-2016-2167)

Update instructions:

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

Ubuntu 12.04 ESM:
  libapache2-svn                  1.6.17dfsg-3ubuntu3.7
 
 libsvn1                         1.6.17dfsg-3ubuntu3.7
  subversion                      1.6.17dfsg-3ubuntu3.7

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

References:
  https://www.ubuntu.com/usn/usn-3388-2
  https://www.ubuntu.com/usn/usn-3388-1
  CVE-2016-2167, CVE-2016-2168, CVE-2017-9800

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