Red Hat Bugzilla – Bug 1023239
CVE-2013-4463 OpenStack Nova: Compressed disk image DoS
Last modified: 2016-04-26 16:39:58 EDT
Thierry Carrez of the OpenStack project reports:
Title: Potential Nova denial of service through compressed disk images
Reporter: Bernhard M. Wiedemann (SUSE)
Affects: All versions
Bernhard M. Wiedemann from SUSE reported a vulnerability in Nova's
control of the size of disk images. By using malicious compressed qcow2
disk images, an authenticated user may consume large amounts of disk
space for each image, potentially resulting in a Denial of Service
attack on Nova compute nodes. This issue has been given the identifier
Additionally while fixing this issue, Pedraig Brady from Red Hat additionally discovered that OSSA 2013-012 did not fully address CVE-2013-2096 in the non-default case where use_cow_images=False, and malicious qcow images are being transferred from Glance. In that specific case, an authenticated user could still consume large amounts of disk space for each instance using the malicious image, potentially also resulting in a Denial of Service attack on Nova compute nodes. The provided fixes address both issues. This issue was given the identifier CVE-2013-4469, please see bug 1023581 for additional information
Red Hat would like to thank Thierry Carrez of the OpenStack project for reporting this issue. Upstream acknowledges Bernhard M. Wiedemann of SuSE as the original reporter.
This has been CVE SPLIT, the second issue found by Pedraig Brady is now covered in Bz1023581 (CVE-2013-4469)
Created attachment 816275 [details]
Created attachment 816276 [details]
Created attachment 816277 [details]
The Red Hat Security Response Team has rated this issue as having moderate security impact. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Added tracking bugs
openstack-nova-2013.1.4-3.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
openstack-nova-2013.2-4.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in following products:
OpenStack 3 for RHEL 6
Via RHSA-2014:0112 https://rhn.redhat.com/errata/RHSA-2014-0112.html