7.8 - USN-2721-1

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