The XML libraries for Python 3.4, 3.3, 3.2, 3.1, 2.7, and 2.6, as used in OpenStack Keystone Essex, Folsom, and Grizzly; Compute (Nova) Essex and Folsom; Cinder Folsom; Django; and possibly other products allow remote attackers to cause a denial of service (resource consumption and crash) via an XML Entity Expansion (XEE) attack.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| http://www.openwall.com/lists/oss-security/2013/02/19/4 | mailing list |
| http://lists.openstack.org/pipermail/openstack-announce/2013-February/000078.html | mailing list vendor advisory |
| http://rhn.redhat.com/errata/RHSA-2013-0658.html | vendor advisory |
| http://www.openwall.com/lists/oss-security/2013/02/19/2 | mailing list |
| http://ubuntu.com/usn/usn-1757-1 | vendor advisory |
| http://rhn.redhat.com/errata/RHSA-2013-0657.html | vendor advisory |
| https://bugs.launchpad.net/nova/+bug/1100282 | exploit |
| http://blog.python.org/2013/02/announcing-defusedxml-fixes-for-xml.html | |
| http://rhn.redhat.com/errata/RHSA-2013-0670.html | vendor advisory |
| http://bugs.python.org/issue17239 |