Red Hat Security Advisory: kernel security and bug fix update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2012:1426 Final 1 1 2012-11-06T16:26:00Z Current version 2012-11-06T16:26:00Z 2012-11-06T16:26:00Z Red Hat rhsa-to-cvrf 1.0.1484 2012-11-06T18:15:03Z Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 6. The Red Hat Security Response Team has rated this update as having moderate security impact. Common Vulnerability Scoring System (CVSS) base scores, which give detailed severity ratings, are available for each vulnerability from the CVE links in the References section. The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issues: * A use-after-free flaw was found in the Linux kernel's memory management subsystem in the way quota handling for huge pages was performed. A local, unprivileged user could use this flaw to cause a denial of service or, potentially, escalate their privileges. (CVE-2012-2133, Moderate) * A use-after-free flaw was found in the madvise() system call implementation in the Linux kernel. A local, unprivileged user could use this flaw to cause a denial of service or, potentially, escalate their privileges. (CVE-2012-3511, Moderate) * It was found that when running a 32-bit binary that uses a large number of shared libraries, one of the libraries would always be loaded at a predictable address in memory. An attacker could use this flaw to bypass the Address Space Layout Randomization (ASLR) security feature. (CVE-2012-1568, Low) * Buffer overflow flaws were found in the udf_load_logicalvol() function in the Universal Disk Format (UDF) file system implementation in the Linux kernel. An attacker with physical access to a system could use these flaws to cause a denial of service or escalate their privileges. (CVE-2012-3400, Low) Red Hat would like to thank Shachar Raindel for reporting CVE-2012-2133. This update also fixes several bugs. Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section. Users should upgrade to these updated packages, which contain backported patches to correct these issues, and fix the bugs noted in the Technical Notes. The system must be rebooted 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-2012-1426.html https://rhn.redhat.com/errata/RHSA-2012-1426.html https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/security/updates/classification/#moderate https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.3_Technical_Notes/kernel.html#RHSA-2012-1426 https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.3_Technical_Notes/kernel.html#RHSA-2012-1426 https://bugzilla.redhat.com/show_bug.cgi?id=860787 https://bugzilla.redhat.com/show_bug.cgi?id=860787 Red Hat Enterprise Linux HPC Node Optional (v. 6) Red Hat Enterprise Linux Server (v. 6) Red Hat Enterprise Linux Workstation (v. 6) Red Hat Enterprise Linux Desktop Optional (v. 6) Red Hat Enterprise Linux Workstation Optional (v. 6) Red Hat Enterprise Linux HPC Node (v. 6) Red Hat Enterprise Linux Desktop (v. 6) Red Hat Enterprise Linux Server Optional (v. 6) kernel-2.6.32-279.14.1.el6.src.rpm kernel-2.6.32-279.14.1.el6 as a component of Red Hat Enterprise Linux HPC Node Optional (v. 6) kernel-2.6.32-279.14.1.el6 as a component of Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-279.14.1.el6 as a component of Red Hat Enterprise Linux Workstation (v. 6) kernel-2.6.32-279.14.1.el6 as a component of Red Hat Enterprise Linux Desktop Optional (v. 6) kernel-2.6.32-279.14.1.el6 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6) kernel-2.6.32-279.14.1.el6 as a component of Red Hat Enterprise Linux HPC Node (v. 6) kernel-2.6.32-279.14.1.el6 as a component of Red Hat Enterprise Linux Desktop (v. 6) kernel-2.6.32-279.14.1.el6 as a component of Red Hat Enterprise Linux Server Optional (v. 6) It was found that when running a 32-bit binary that uses a large number of shared libraries, one of the libraries would always be loaded at a predictable address in memory. An attacker could use this flaw to bypass the Address Space Layout Randomization (ASLR) security feature. 2012-03-17T00:00:00Z 2012-03-17T00:00:00Z CVE-2012-1568 6Client-6.3.z:kernel-2.6.32-279.14.1.el6 6Client-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6ComputeNode-6.3.z:kernel-2.6.32-279.14.1.el6 6ComputeNode-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6Server-6.3.z:kernel-2.6.32-279.14.1.el6 6Server-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6Workstation-6.3.z:kernel-2.6.32-279.14.1.el6 6Workstation-optional-6.3.z:kernel-2.6.32-279.14.1.el6 Low 1.9 AV:N/AC:L/Au:N/C:N/I:P/A:N 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 To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system. https://rhn.redhat.com/errata/RHSA-2012-1426.html https://www.redhat.com/security/data/cve/CVE-2012-1568.html CVE-2012-1568 https://bugzilla.redhat.com/show_bug.cgi?id=804947 bz#804947: CVE-2012-1568 kernel: execshield: predictable ascii armour base address A use-after-free flaw was found in the Linux kernel's memory management subsystem in the way quota handling for huge pages was performed. A local, unprivileged user could use this flaw to cause a denial of service or, potentially, escalate their privileges. 2012-04-22T00:00:00Z 2012-03-22T00:00:00Z CVE-2012-2133 6Client-6.3.z:kernel-2.6.32-279.14.1.el6 6Client-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6ComputeNode-6.3.z:kernel-2.6.32-279.14.1.el6 6ComputeNode-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6Server-6.3.z:kernel-2.6.32-279.14.1.el6 6Server-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6Workstation-6.3.z:kernel-2.6.32-279.14.1.el6 6Workstation-optional-6.3.z:kernel-2.6.32-279.14.1.el6 Moderate 6.2 AV:L/AC:H/Au:N/C:C/I:C/A:C 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 To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system. https://rhn.redhat.com/errata/RHSA-2012-1426.html https://www.redhat.com/security/data/cve/CVE-2012-2133.html CVE-2012-2133 https://bugzilla.redhat.com/show_bug.cgi?id=817430 bz#817430: CVE-2012-2133 kernel: use after free bug in "quota" handling Red Hat would like to thank Shachar Raindel for reporting this issue. Buffer overflow flaws were found in the udf_load_logicalvol() function in the Universal Disk Format (UDF) file system implementation in the Linux kernel. An attacker with physical access to a system could use these flaws to cause a denial of service or escalate their privileges. 2012-07-03T00:00:00Z 2012-06-27T00:00:00Z CVE-2012-3400 6Client-6.3.z:kernel-2.6.32-279.14.1.el6 6Client-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6ComputeNode-6.3.z:kernel-2.6.32-279.14.1.el6 6ComputeNode-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6Server-6.3.z:kernel-2.6.32-279.14.1.el6 6Server-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6Workstation-6.3.z:kernel-2.6.32-279.14.1.el6 6Workstation-optional-6.3.z:kernel-2.6.32-279.14.1.el6 Low 6.2 AV:L/AC:H/Au:N/C:C/I:C/A:C 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 To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system. https://rhn.redhat.com/errata/RHSA-2012-1426.html https://www.redhat.com/security/data/cve/CVE-2012-3400.html CVE-2012-3400 https://bugzilla.redhat.com/show_bug.cgi?id=843139 bz#843139: CVE-2012-3400 kernel: udf: buffer overflow when parsing sparing table A use-after-free flaw was found in the madvise() system call implementation in the Linux kernel. A local, unprivileged user could use this flaw to cause a denial of service or, potentially, escalate their privileges. 2012-07-16T00:00:00Z 2012-07-06T00:00:00Z CVE-2012-3511 6Client-6.3.z:kernel-2.6.32-279.14.1.el6 6Client-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6ComputeNode-6.3.z:kernel-2.6.32-279.14.1.el6 6ComputeNode-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6Server-6.3.z:kernel-2.6.32-279.14.1.el6 6Server-optional-6.3.z:kernel-2.6.32-279.14.1.el6 6Workstation-6.3.z:kernel-2.6.32-279.14.1.el6 6Workstation-optional-6.3.z:kernel-2.6.32-279.14.1.el6 Moderate 6.2 AV:L/AC:H/Au:N/C:C/I:C/A:C 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 To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system. https://rhn.redhat.com/errata/RHSA-2012-1426.html https://www.redhat.com/security/data/cve/CVE-2012-3511.html CVE-2012-3511 https://bugzilla.redhat.com/show_bug.cgi?id=849734 bz#849734: CVE-2012-3511 kernel: mm: use-after-free in madvise_remove()