06 September 2012
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2012.0844 Important: xen security update 6 September 2012 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: xen Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 5 Red Hat Enterprise Linux WS/Desktop 5 Impact/Access: Denial of Service -- Existing Account Increased Privileges -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2012-3515 Reference: ESB-2012.0843 ESB-2012.0842 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2012-1236.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: xen security update Advisory ID: RHSA-2012:1236-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.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: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xen-3.0.3-135.el5_8.5.src.rpm 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: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/xen-3.0.3-135.el5_8.5.src.rpm 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: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xen-3.0.3-135.el5_8.5.src.rpm 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. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/xen-3.0.3-135.el5_8.5.src.rpm 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://www.redhat.com/security/data/cve/CVE-2012-3515.html https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is <firstname.lastname@example.org>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2012 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFQR4bxXlSAg2UNWIIRArHnAJ40hJ85kcaujeunn+Roj+BwjUikJwCgpkyl JvqfaaqHDVoBwoVvwe2RY3g= =vXCr - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. 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