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Ubuntu Security Notice USN-1887-1
June 20, 2013

swift vulnerabilities

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

• Ubuntu 13.04
• Ubuntu 12.10
• Ubuntu 12.04 LTS

Summary:

Multiple security issues were fixed in OpenStack Swift.

Software Description:

• swift: OpenStack distributed virtual object store

Details:

Sebastian Krahmer discovered that Swift used the loads function in the
pickle Python module when it was configured to use memcached. A remote
attacker on the same network as memcached could exploit this to execute
arbitrary code. This update adds a new memcache_serialization_support
option to support secure json serialization. For details on this new
option, please see /usr/share/doc/swift-proxy/memcache.conf-sample. This
issue only affected Ubuntu 12.04 LTS. (CVE-2012-4406)

Alex Gaynor discovered that Swift did not safely generate XML. An
attacker could potentially craft an account name to generate arbitrary XML
responses to trigger vulnerabilties in software parsing Swift's XML.
(CVE-2013-2161)

Update instructions:

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

Ubuntu 13.04:
python-swift 1.8.0-0ubuntu1.2

Ubuntu 12.10:
python-swift 1.7.4-0ubuntu2.2

Ubuntu 12.04 LTS:
python-swift 1.4.8-0ubuntu2.2

After a standard system update you need to restart Swift to make all the
necessary changes.

References:
http://www.ubuntu.com/usn/usn-1887-1
CVE-2012-4406, CVE-2013-2161

Package Information:
https://launchpad.net/ubuntu/+source/swift/1.8.0-0ubuntu1.2
https://launchpad.net/ubuntu/+source/swift/1.7.4-0ubuntu2.2
https://launchpad.net/ubuntu/+source/swift/1.4.8-0ubuntu2.2

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