Red Hat Security Advisory: kernel security update Security Advisory secalert@redhat.com Red Hat Security Response Team RHSA-2012:1114 Final 1 1 2012-07-24T17:44:00Z Current version 2012-07-24T17:44:00Z 2012-07-24T17:44:00Z Red Hat rhsa-to-cvrf 1.0.1484 2012-07-24T18:52:02Z 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. 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. Please see https://www.redhat.com/footer/terms-of-use.html Copyright © 2012 Red Hat, Inc. All rights reserved. Important https://rhn.redhat.com/errata/RHSA-2012-1114.html https://rhn.redhat.com/errata/RHSA-2012-1114.html https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/updates/classification/#important Red Hat Enterprise Linux Server EUS (v. 6.0) kernel-2.6.32-71.40.1.el6.src.rpm kernel-2.6.32-71.40.1.el6 as a component of Red Hat Enterprise Linux Server EUS (v. 6.0) 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. 2012-06-13T00:00:00Z 2012-07-10T00:00:00Z CVE-2012-2744 6Server-6.0.z:kernel-2.6.32-71.40.1.el6 Important 7.8 AV:N/AC:L/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-2012-1114.html https://www.redhat.com/security/data/cve/CVE-2012-2744.html CVE-2012-2744 https://bugzilla.redhat.com/show_bug.cgi?id=833402 bz#833402: CVE-2012-2744 kernel: netfilter: null pointer dereference in nf_ct_frag6_reasm() Red Hat would like to thank an anonymous contributor working with Beyond Security's SecuriTeam Secure Disclosure program for reporting this issue.