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Red Hat Enterprise Linux 5: RHSA-2012-1130-01 Moderate: Xen Security Issue

red hat
Calendar Grey July 31, 2012
Scroller Redhat
Recent enhancements to xen packages for Red Hat Enterprise Linux 5 have been released to mitigate a moderate security vulnerability. It is recommended to implement this update.
Updated xen packages that fix one security issue are now available for Red Hat Enterprise Linux 5

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258

Summary

The xen packages contain administration tools and the xend service for managing the kernel-xen kernel for virtualization on Red Hat Enterprise Linux.
A flaw was found in the way the pyGrub boot loader handled compressed kernel images. A privileged guest user in a para-virtualized guest (a DomU) could use this flaw to create a crafted kernel image that, when attempting to boot it, could result in an out-of-memory condition in the privileged domain (the Dom0). (CVE-2012-2625)
Red Hat would like to thank Xinli Niu for reporting this issue.
All users of xen are advised to upgrade to these updated packages, which contain a backported patch to correct this issue. After installing the updated packages, the xend service must be restarted for this update to take effect.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat Enterprise Linux xen

References

https://access.redhat.com/security/cve/CVE-2012-2625 https://access.redhat.com/security/updates/classification#moderate

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: xen-debuginfo-3.0.3-135.el5_8.4.i386.rpm xen-libs-3.0.3-135.el5_8.4.i386.rpm
x86_64: xen-debuginfo-3.0.3-135.el5_8.4.i386.rpm xen-debuginfo-3.0.3-135.el5_8.4.x86_64.rpm xen-libs-3.0.3-135.el5_8.4.i386.rpm xen-libs-3.0.3-135.el5_8.4.x86_64.rpm
RHEL Desktop Multi OS (v. 5 client):
Source:
i386: xen-3.0.3-135.el5_8.4.i386.rpm xen-debuginfo-3.0.3-135.el5_8.4.i386.rpm xen-devel-3.0.3-135.el5_8.4.i386.rpm
x86_64: xen-3.0.3-135.el5_8.4.x86_64.rpm xen-debuginfo-3.0.3-135.el5_8.4.i386.rpm xen-debuginfo-3.0.3-135.el5_8.4.x86_64.rpm xen-devel-3.0.3-135.el5_8.4.i386.rpm xen-devel-3.0.3-135.el5_8.4.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: xen-debuginfo-3.0.3-135.el5_8.4.i386.rpm xen-libs-3.0.3-135.el5_8.4.i386.rpm
ia64: xen-debuginfo-3.0.3-135.el5_8.4.ia64.rpm xen-libs-3.0.3-135.el5_8.4.ia64.rpm
x86_64: xen-debuginfo-3.0.3-135.el5_8.4.i386.rpm xen-debuginfo-3.0.3-135.el5_8.4.x86_64.rpm xen-libs-3.0.3-135.el5_8.4.i386.rpm xen-libs-3.0.3-135.el5_8.4.x86_64.rpm
RHEL Virtualization (v. 5 server):
Source:
i386: xen-3.0.3-135.el5_8.4.i386.rpm xen-debuginfo-3.0.3-135.el5_8.4.i386.rpm xen-devel-3.0.3-135.el5_8.4.i386.rpm
ia64: xen-3.0.3-135.el5_8.4.ia64.rpm xen-debuginfo-3.0.3-135.el5_8.4.ia64.rpm

Read the Full Advisory


Advisory ID: RHSA-2012:1130-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2012:1130.html
Issue date: 2012-07-31

Topic

Updated xen packages that fix one security issue are now available forRed Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory moderate security update Red Hat Enterprise Linux xen

Relevant Releases Architectures

RHEL Desktop Multi OS (v. 5 client) - i386, x86_64

RHEL Virtualization (v. 5 server) - i386, ia64, x86_64

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Bugs Fixed

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

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