Stay Secure with the Latest Linux Advisories

security advisoryRed Hat Enterprise Linuximportant update

RHEL 5: RHSA-2012:1236-01 Critical: Xen Emulation Flaw Issue

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 [More...]. ==================================================================== Red Hat Security Advisory Synopsis: Important: xen security update Advisory ID: RHSA-2012:1236-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2012:1236.html Issue date: 2012-09-05 CVE Names: CVE-2012-3515 ==================================================================== 1. Summary: 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 important 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. 2. 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 3. Description: 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 QEMU handled VT100 terminal escape sequences when emulating certain character devices. A guest user with privileges to write to a character device that is emulated on the host using a virtual console back-end could use this flaw to crash the qemu process on the host or, possibly, escalate their privileges on the host. (CVE-2012-3515) This flaw did not affect the default use of the Xen hypervisor implementation in Red Hat Enterprise Linux 5. This problem only affected fully-virtualized guests that have a serial or parallel device that uses a virtual console (vc) back-end. By default,the virtual console back-end is not used for such devices; only guests explicitly configured to use them in this way were affected. Red Hat would like to thank the Xen project for reporting this issue. All users of xen are advised to upgrade to these updated packages, which correct this issue. After installing the updated packages, all fully-virtualized guests must be restarted for this update to take effect. 4. 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/knowledge/articles/11258 5. Bugs fixed (http://bugzilla.redhat.com/): 851252 - CVE-2012-3515 qemu: VT100 emulation vulnerability 6. Package List: Red Hat Enterprise Linux Desktop (v. 5 client): Source: i386: xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm xen-libs-3.0.3-135.el5_8.5.i386.rpm x86_64: xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm xen-debuginfo-3.0.3-135.el5_8.5.x86_64.rpm xen-libs-3.0.3-135.el5_8.5.i386.rpm xen-libs-3.0.3-135.el5_8.5.x86_64.rpm RHEL Desktop Multi OS (v. 5 client): Source: i386: xen-3.0.3-135.el5_8.5.i386.rpm xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm xen-devel-3.0.3-135.el5_8.5.i386.rpm x86_64: xen-3.0.3-135.el5_8.5.x86_64.rpm xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm xen-debuginfo-3.0.3-135.el5_8.5.x86_64.rpm xen-devel-3.0.3-135.el5_8.5.i386.rpm xen-devel-3.0.3-135.el5_8.5.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: i386: xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm xen-libs-3.0.3-135.el5_8.5.i386.rpm ia64: xen-debuginfo-3.0.3-135.el5_8.5.ia64.rpm xen-libs-3.0.3-135.el5_8.5.ia64.rpm x86_64: xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm xen-debuginfo-3.0.3-135.el5_8.5.x86_64.rpm xen-libs-3.0.3-135.el5_8.5.i386.rpm xen-libs-3.0.3-135.el5_8.5.x86_64.rpm RHEL Virtualization (v. 5server): Source: i386: xen-3.0.3-135.el5_8.5.i386.rpm xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm xen-devel-3.0.3-135.el5_8.5.i386.rpm ia64: xen-3.0.3-135.el5_8.5.ia64.rpm xen-debuginfo-3.0.3-135.el5_8.5.ia64.rpm xen-devel-3.0.3-135.el5_8.5.ia64.rpm x86_64: xen-3.0.3-135.el5_8.5.x86_64.rpm xen-debuginfo-3.0.3-135.el5_8.5.i386.rpm xen-debuginfo-3.0.3-135.el5_8.5.x86_64.rpm xen-devel-3.0.3-135.el5_8.5.i386.rpm xen-devel-3.0.3-135.el5_8.5.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/#package 7. References: https://access.redhat.com/security/cve/CVE-2012-3515 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2012 Red Hat, Inc. . Keep abreast of vital security patches for Xen in Red Hat Enterprise Linux 5. Upgrade promptly to safeguard your infrastructure.. RHEL 5, xen security, emulation flaw, virtualization update, important advisory. . Severity: Important. LinuxSecurity.com Team

Sep 05, 2012 •Important Red Hat