The PyGrub boot loader in Xen unstable before changeset 25589:60f09d1ab1fe, 4.2.x, and 4.1.x allows local para-virtualized guest users to cause a denial of service (memory consumption) via a large (1) bzip2 or (2) lzma compressed kernel image.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-2625
• http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1817
• http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00024.html
• http://lists.opensuse.org/opensuse-security-announce/2012-08/msg00025.html
• http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00005.html
• http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html
• http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00018.html
• http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
• http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
• http://rhn.redhat.com/errata/RHSA-2012-1130.html
• http://secunia.com/advisories/49184
• http://secunia.com/advisories/51413
• http://www.openwall.com/lists/oss-security/2012/10/26/3
• http://www.securityfocus.com/bid/53650
• http://www.securitytracker.com/id?1027090
• http://xenbits.xensource.com/hg/xen-unstable.hg/rev/60f09d1ab1fe