USN-3388-1: Subversion vulnerabilities

11 August 2017

subversion vulnerabilities

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

  • Ubuntu 17.04
  • Ubuntu 16.04 LTS
  • Ubuntu 14.04 LTS

Summary

Several security issues were fixed in Subversion.

Software Description

  • subversion - Advanced version control system

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. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2167)

Florian Weimer discovered that Subversion clients did not properly restrict XML entity expansion when accessing http(s):// URLs. A remote attacker could use this to cause a denial of service. This issue only affected Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-8734)

Update instructions

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

Ubuntu 17.04
libsvn1 - 1.9.5-1ubuntu1.1
subversion - 1.9.5-1ubuntu1.1
Ubuntu 16.04 LTS
libapache2-mod-svn - 1.9.3-2ubuntu1.1
libapache2-svn - 1.9.3-2ubuntu1.1
libsvn1 - 1.9.3-2ubuntu1.1
subversion - 1.9.3-2ubuntu1.1
Ubuntu 14.04 LTS
libapache2-mod-svn - 1.8.8-1ubuntu3.3
libapache2-svn - 1.8.8-1ubuntu3.3
libsvn1 - 1.8.8-1ubuntu3.3
subversion - 1.8.8-1ubuntu3.3

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References