Red Hat Security Advisory: xen security update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2012:1130 Final 1 1 2012-07-31T18:36:00Z Current version 2012-07-31T18:36:00Z 2012-07-31T18:36:00Z Red Hat rhsa-to-cvrf 1.0.1484 2012-07-31T18:45:02Z Updated xen packages that fix one security issue are now available for Red Hat Enterprise Linux 5. The Red Hat Security Response Team has rated this update as having moderate security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section. 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. Please see https://www.redhat.com/footer/terms-of-use.html Copyright © 2012 Red Hat, Inc. All rights reserved. Moderate https://rhn.redhat.com/errata/RHSA-2012-1130.html https://rhn.redhat.com/errata/RHSA-2012-1130.html https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/updates/classification/#moderate Red Hat Enterprise Linux Desktop (v. 5 client) RHEL Virtualization (v. 5 server) RHEL Desktop Multi OS (v. 5 client) Red Hat Enterprise Linux (v. 5 server) xen-3.0.3-135.el5_8.4.src.rpm xen-3.0.3-135.el5_8.4 as a component of Red Hat Enterprise Linux Desktop (v. 5 client) xen-3.0.3-135.el5_8.4 as a component of RHEL Virtualization (v. 5 server) xen-3.0.3-135.el5_8.4 as a component of RHEL Desktop Multi OS (v. 5 client) xen-3.0.3-135.el5_8.4 as a component of Red Hat Enterprise Linux (v. 5 server) 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). 2012-05-02T00:00:00Z 2012-05-04T00:00:00Z CVE-2012-2625 5Client-5.8.Z:xen-3.0.3-135.el5_8.4 5Client-VT-5.8.Z:xen-3.0.3-135.el5_8.4 5Server-5.8.Z:xen-3.0.3-135.el5_8.4 5Server-VT-5.8.Z:xen-3.0.3-135.el5_8.4 Moderate 2.7 AV:A/AC:L/Au:S/C:N/I:N/A:P 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/knowledge/articles/11258 https://rhn.redhat.com/errata/RHSA-2012-1130.html https://www.redhat.com/security/data/cve/CVE-2012-2625.html CVE-2012-2625 https://bugzilla.redhat.com/show_bug.cgi?id=821676 bz#821676: CVE-2012-2625 xen: pv bootloader doesn't check the size of the bzip2 or lzma compressed kernel Red Hat would like to thank Xinli Niu for reporting this issue.