[OSSA 2015-006] Unauthorized delete of versioned Swift object (CVE-2015-1856)

[Tristan Cacqueray <tristan.cacqueray () enovance com>]

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OSSA-2015-006: Unauthorized delete of versioned Swift object
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:Date: April 14, 2015
:CVE: CVE-2015-1856


Affects
~~~~~~~
- Swift: versions through 2.2.2


Description
~~~~~~~~~~~
Clay Gerrard from SwiftStack reported a vulnerability in Swift object
versioning. An authenticated user can delete the most recent version
of any versioned object whose name is known if the user have listing
access to the x-versions-location container. Only Swift setups with
allow_version setting are affected.


Patches
~~~~~~~
- https://review.openstack.org/173366 (Icehouse)
- https://review.openstack.org/173363 (Juno)
- https://review.openstack.org/173361 (Kilo)


Credits
~~~~~~~
- Clay Gerrard from SwiftStack (CVE-2015-1856)


References
~~~~~~~~~~
- https://launchpad.net/bugs/1430645
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1856


Notes
~~~~~
- This fix will be included in the upcoming 2.3.0 release.

--
Tristan Cacqueray
OpenStack Vulnerability Management Team

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