Public Date:
821676: CVE-2012-2625 xen: pv bootloader doesn't check the size of the bzip2 or lzma compressed kernel

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2012-2625 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 2.7
Base Metrics AV:A/AC:L/Au:S/C:N/I:N/A:P
Access Vector Adjacent Network
Access Complexity Low
Authentication Single
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux Virtualization version 5 (xen) RHSA-2012:1130 2012-07-31
Red Hat Enterprise Linux version 5 (xen) RHSA-2012:1130 2012-07-31


Red Hat would like to thank Xinli Niu for reporting this issue.