Red Hat Security Advisory: kernel security, bug fix and enhancement update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2012:1580 Final 1 1 2012-12-18T20:57:00Z Current version 2012-12-18T20:57:00Z 2012-12-18T20:57:00Z Red Hat rhsa-to-cvrf 1.0.1484 2012-12-18T22:37:02Z Updated kernel packages that fix multiple security issues, numerous bugs and add one enhancement 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: * It was found that the RHSA-2012:0862 update did not correctly fix the CVE-2011-4131 issue. A malicious Network File System version 4 (NFSv4) server could return a crafted reply to a GETACL request, causing a denial of service on the client. (CVE-2012-2375, Moderate) * A divide-by-zero flaw was found in the TCP Illinois congestion control algorithm implementation in the Linux kernel. If the TCP Illinois congestion control algorithm were in use (the sysctl net.ipv4.tcp_congestion_control variable set to "illinois"), a local, unprivileged user could trigger this flaw and cause a denial of service. (CVE-2012-4565, Moderate) * A NULL pointer dereference flaw was found in the way a new node's hot added memory was propagated to other nodes' zonelists. By utilizing this newly added memory from one of the remaining nodes, a local, unprivileged user could use this flaw to cause a denial of service. (CVE-2012-5517, Moderate) * It was found that the initial release of Red Hat Enterprise Linux 6 did not correctly fix the CVE-2009-4307 issue, a divide-by-zero flaw in the ext4 file system code. A local, unprivileged user with the ability to mount an ext4 file system could use this flaw to cause a denial of service. (CVE-2012-2100, Low) * A flaw was found in the way the Linux kernel's IPv6 implementation handled overlapping, fragmented IPv6 packets. A remote attacker could potentially use this flaw to bypass protection mechanisms (such as a firewall or intrusion detection system (IDS)) when sending network packets to a target system. (CVE-2012-4444, Low) Red Hat would like to thank Antonios Atlasis working with Beyond Security's SecuriTeam Secure Disclosure program and Loganaden Velvindron of AFRINIC for reporting CVE-2012-4444. The CVE-2012-2375 issue was discovered by Jian Li of Red Hat, and CVE-2012-4565 was discovered by Rodrigo Freire of Red Hat. This update also fixes numerous bugs and adds one enhancement. Space precludes documenting all of these changes in this advisory. Documentation for these changes will be available shortly from the Red Hat Enterprise Linux 6.3 Technical Notes document linked to in the References section. Users should upgrade to these updated packages, which contain backported patches to correct these issues, fix these bugs and add the enhancement 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-2012-1580.html https://rhn.redhat.com/errata/RHSA-2012-1580.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-2012-1580 https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.3_Technical_Notes/kernel.html#RHSA-2012-1580 https://rhn.redhat.com/errata/RHSA-2012-0862.html https://rhn.redhat.com/errata/RHSA-2012-0862.html https://bugzilla.redhat.com/show_bug.cgi?id=876549 https://bugzilla.redhat.com/show_bug.cgi?id=876549 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-2.6.32-279.19.1.el6.src.rpm kernel-2.6.32-279.19.1.el6 as a component of Red Hat Enterprise Linux HPC Node Optional (v. 6) kernel-2.6.32-279.19.1.el6 as a component of Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-279.19.1.el6 as a component of Red Hat Enterprise Linux Workstation (v. 6) kernel-2.6.32-279.19.1.el6 as a component of Red Hat Enterprise Linux Desktop Optional (v. 6) kernel-2.6.32-279.19.1.el6 as a component of Red Hat Enterprise Linux Workstation Optional (v. 6) kernel-2.6.32-279.19.1.el6 as a component of Red Hat Enterprise Linux HPC Node (v. 6) kernel-2.6.32-279.19.1.el6 as a component of Red Hat Enterprise Linux Desktop (v. 6) kernel-2.6.32-279.19.1.el6 as a component of Red Hat Enterprise Linux Server Optional (v. 6) It was found that the initial release of Red Hat Enterprise Linux 6 did not correctly fix the CVE-2009-4307 issue, a divide-by-zero flaw in the ext4 file system code. A local, unprivileged user with the ability to mount an ext4 file system could use this flaw to cause a denial of service. 2012-04-04T00:00:00Z 2012-01-10T00:00:00Z CVE-2012-2100 6Client-6.3.z:kernel-2.6.32-279.19.1.el6 6Client-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6ComputeNode-6.3.z:kernel-2.6.32-279.19.1.el6 6ComputeNode-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6Server-6.3.z:kernel-2.6.32-279.19.1.el6 6Server-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6Workstation-6.3.z:kernel-2.6.32-279.19.1.el6 6Workstation-optional-6.3.z:kernel-2.6.32-279.19.1.el6 Low 4.0 AV:L/AC:H/Au:N/C:N/I:N/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-2012-1580.html https://www.redhat.com/security/data/cve/CVE-2012-2100.html CVE-2012-2100 https://bugzilla.redhat.com/show_bug.cgi?id=809687 bz#809687: CVE-2012-2100 kernel: ext4: fix inconsistency in ext4_fill_flex_info() It was found that the RHSA-2012:0862 update did not correctly fix the CVE-2011-4131 issue. A malicious Network File System version 4 (NFSv4) server could return a crafted reply to a GETACL request, causing a denial of service on the client. 2012-03-29T00:00:00Z 2012-03-22T00:00:00Z CVE-2012-2375 6Client-6.3.z:kernel-2.6.32-279.19.1.el6 6Client-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6ComputeNode-6.3.z:kernel-2.6.32-279.19.1.el6 6ComputeNode-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6Server-6.3.z:kernel-2.6.32-279.19.1.el6 6Server-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6Workstation-6.3.z:kernel-2.6.32-279.19.1.el6 6Workstation-optional-6.3.z:kernel-2.6.32-279.19.1.el6 Moderate 4.6 AV:A/AC:H/Au:N/C:N/I:N/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-2012-1580.html https://www.redhat.com/security/data/cve/CVE-2012-2375.html CVE-2012-2375 https://bugzilla.redhat.com/show_bug.cgi?id=822869 bz#822869: CVE-2012-2375 kernel: incomplete fix for CVE-2011-4131 This issue was discovered by Jian Li of Red Hat. A flaw was found in the way the Linux kernel's IPv6 implementation handled overlapping, fragmented IPv6 packets. A remote attacker could potentially use this flaw to bypass protection mechanisms (such as a firewall or intrusion detection system (IDS)) when sending network packets to a target system. 2012-06-04T00:00:00Z 2009-12-01T00:00:00Z CVE-2012-4444 6Client-6.3.z:kernel-2.6.32-279.19.1.el6 6Client-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6ComputeNode-6.3.z:kernel-2.6.32-279.19.1.el6 6ComputeNode-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6Server-6.3.z:kernel-2.6.32-279.19.1.el6 6Server-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6Workstation-6.3.z:kernel-2.6.32-279.19.1.el6 6Workstation-optional-6.3.z:kernel-2.6.32-279.19.1.el6 Low 2.6 AV:N/AC:H/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-2012-1580.html https://www.redhat.com/security/data/cve/CVE-2012-4444.html CVE-2012-4444 https://bugzilla.redhat.com/show_bug.cgi?id=874835 bz#874835: CVE-2012-4444 kernel: net: acceptation of overlapping ipv6 fragments Red Hat would like to thank Antonios Atlasis working with Beyond Security's SecuriTeam Secure Disclosure program and Loganaden Velvindron of AFRINIC for reporting this issue. A divide-by-zero flaw was found in the TCP Illinois congestion control algorithm implementation in the Linux kernel. If the TCP Illinois congestion control algorithm were in use (the sysctl net.ipv4.tcp_congestion_control variable set to "illinois"), a local, unprivileged user could trigger this flaw and cause a denial of service. 2012-10-15T00:00:00Z 2012-10-31T00:00:00Z CVE-2012-4565 6Client-6.3.z:kernel-2.6.32-279.19.1.el6 6Client-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6ComputeNode-6.3.z:kernel-2.6.32-279.19.1.el6 6ComputeNode-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6Server-6.3.z:kernel-2.6.32-279.19.1.el6 6Server-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6Workstation-6.3.z:kernel-2.6.32-279.19.1.el6 6Workstation-optional-6.3.z:kernel-2.6.32-279.19.1.el6 Moderate 4.7 AV:L/AC:M/Au:N/C:N/I:N/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-2012-1580.html https://www.redhat.com/security/data/cve/CVE-2012-4565.html CVE-2012-4565 https://bugzilla.redhat.com/show_bug.cgi?id=871848 bz#871848: CVE-2012-4565 kernel: net: divide by zero in tcp algorithm illinois This issue was discovered by Rodrigo Freire of Red Hat. A NULL pointer dereference flaw was found in the way a new node's hot added memory was propagated to other nodes' zonelists. By utilizing this newly added memory from one of the remaining nodes, a local, unprivileged user could use this flaw to cause a denial of service. 2012-10-26T00:00:00Z 2012-08-01T00:00:00Z CVE-2012-5517 6Client-6.3.z:kernel-2.6.32-279.19.1.el6 6Client-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6ComputeNode-6.3.z:kernel-2.6.32-279.19.1.el6 6ComputeNode-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6Server-6.3.z:kernel-2.6.32-279.19.1.el6 6Server-optional-6.3.z:kernel-2.6.32-279.19.1.el6 6Workstation-6.3.z:kernel-2.6.32-279.19.1.el6 6Workstation-optional-6.3.z:kernel-2.6.32-279.19.1.el6 Moderate 4 AV:L/AC:H/Au:N/C:N/I:N/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-2012-1580.html https://www.redhat.com/security/data/cve/CVE-2012-5517.html CVE-2012-5517 https://bugzilla.redhat.com/show_bug.cgi?id=875374 bz#875374: CVE-2012-5517 kernel: mm/hotplug: failure in propagating hot-added memory to other nodes