The kernel packages contain the Linux kernel, the core of any Linux operating system. A NULL pointer dereference flaw was found in the
nf_ct_frag6_reasm() function in the Linux kernel’s netfilter IPv6 connection tracking implementation. A remote attacker could use this flaw to send specially-crafted packets to a target system that is using IPv6 and also has the nf_conntrack_ipv6 kernel module loaded, causing it to crash. Updated packages are available from ftp.redhat.com.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security update Advisory ID: RHSA-2012:1114-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-1114.html Issue date: 2012-07-24 CVE Names: CVE-2012-2744 ===================================================================== 1. Summary: Updated kernel packages that fix one security issue are now available for Red Hat Enterprise Linux 6.0 Extended Update Support. 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: Red Hat Enterprise Linux Server EUS (v. 6.0) - i386, noarch, ppc64, s390x, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. This update fixes the following security issue: * A NULL pointer dereference flaw was found in the nf_ct_frag6_reasm() function in the Linux kernel's netfilter IPv6 connection tracking implementation. A remote attacker could use this flaw to send specially-crafted packets to a target system that is using IPv6 and also has the nf_conntrack_ipv6 kernel module loaded, causing it to crash. (CVE-2012-2744, Important) Red Hat would like to thank an anonymous contributor working with the Beyond Security SecuriTeam Secure Disclosure program for reporting this issue. Users should upgrade to these updated packages, which contain a backported patch to resolve this issue. The system must be rebooted 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 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. 5. Bugs fixed (http://bugzilla.redhat.com/): 833402 - CVE-2012-2744 kernel: netfilter: null pointer dereference in nf_ct_frag6_reasm() 6. Package List: Red Hat Enterprise Linux Server EUS (v. 6.0): Source: kernel-2.6.32-71.40.1.el6.src.rpm i386: kernel-2.6.32-71.40.1.el6.i686.rpm kernel-debug-2.6.32-71.40.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-71.40.1.el6.i686.rpm kernel-debug-devel-2.6.32-71.40.1.el6.i686.rpm kernel-debuginfo-2.6.32-71.40.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-71.40.1.el6.i686.rpm kernel-devel-2.6.32-71.40.1.el6.i686.rpm kernel-headers-2.6.32-71.40.1.el6.i686.rpm noarch: kernel-doc-2.6.32-71.40.1.el6.noarch.rpm kernel-firmware-2.6.32-71.40.1.el6.noarch.rpm perf-2.6.32-71.40.1.el6.noarch.rpm ppc64: kernel-2.6.32-71.40.1.el6.ppc64.rpm kernel-bootwrapper-2.6.32-71.40.1.el6.ppc64.rpm kernel-debug-2.6.32-71.40.1.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-71.40.1.el6.ppc64.rpm kernel-debug-devel-2.6.32-71.40.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-71.40.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-71.40.1.el6.ppc64.rpm kernel-devel-2.6.32-71.40.1.el6.ppc64.rpm kernel-headers-2.6.32-71.40.1.el6.ppc64.rpm s390x: kernel-2.6.32-71.40.1.el6.s390x.rpm kernel-debug-2.6.32-71.40.1.el6.s390x.rpm kernel-debug-debuginfo-2.6.32-71.40.1.el6.s390x.rpm kernel-debug-devel-2.6.32-71.40.1.el6.s390x.rpm kernel-debuginfo-2.6.32-71.40.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-71.40.1.el6.s390x.rpm kernel-devel-2.6.32-71.40.1.el6.s390x.rpm kernel-headers-2.6.32-71.40.1.el6.s390x.rpm kernel-kdump-2.6.32-71.40.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-71.40.1.el6.s390x.rpm kernel-kdump-devel-2.6.32-71.40.1.el6.s390x.rpm x86_64: kernel-2.6.32-71.40.1.el6.x86_64.rpm kernel-debug-2.6.32-71.40.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-71.40.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-71.40.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-71.40.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-71.40.1.el6.x86_64.rpm kernel-devel-2.6.32-71.40.1.el6.x86_64.rpm kernel-headers-2.6.32-71.40.1.el6.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-2012-2744.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) iD8DBQFQDu8hXlSAg2UNWIIRAgJLAKCkd513kkX2nDKvQ+3L0Uy4qKyNWACgvmFP CZzwFvZos4XWCu/2UPV1mD8= =h7pW -----END PGP SIGNATURE-----