The kernel packages contain the Linux kernel, the core of any Linux operating system. A flaw was found in the way socket buffers (skb) requiring TSO (TCP segment offloading) were handled by the sfc driver. If the skb did not fit within the minimum-size of the transmission queue, the network card could repeatedly reset itself. A remote attacker could use this flaw to cause a denial of service.
A buffer overflow flaw was found in the hfs_bnode_read() function in the HFS Plus (HFS+) file system implementation. A local user able to mount a specially-crafted HFS+ file system image could use this flaw to cause a denial of service or escalate their privileges.
Updated packages are available from ftp.redhat.com.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2012:1347-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-1347.html Issue date: 2012-10-09 CVE Names: CVE-2012-2319 CVE-2012-3412 ===================================================================== 1. Summary: Updated kernel packages that fix two security issues and one bug are now available for Red Hat Enterprise Linux 5.6 Extended Update Support. The Red Hat Security Response Team has rated this update as having important 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. 2. Relevant releases/architectures: Red Hat Enterprise Linux EUS (v. 5.6 server) - i386, ia64, noarch, ppc, 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 issues: * A flaw was found in the way socket buffers (skb) requiring TSO (TCP segment offloading) were handled by the sfc driver. If the skb did not fit within the minimum-size of the transmission queue, the network card could repeatedly reset itself. A remote attacker could use this flaw to cause a denial of service. (CVE-2012-3412, Important) * A buffer overflow flaw was found in the hfs_bnode_read() function in the HFS Plus (HFS+) file system implementation in the Linux kernel. A local user able to mount a specially-crafted HFS+ file system image could use this flaw to cause a denial of service or escalate their privileges. (CVE-2012-2319, Low) Red Hat would like to thank Ben Hutchings of Solarflare (tm) for reporting CVE-2012-3412. This update also fixes the following bug: * Some subsystems clear the TIF_SIGPENDING flag during error handling in fork() paths. Previously, if the flag was cleared, the ERESTARTNOINTR error code could be returned. The underlying source code has been modified so that the error code is no longer returned. (BZ#855754) Users should upgrade to these updated packages, which contain backported patches to correct these issues. 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/): 819471 - CVE-2012-2319 kernel: Buffer overflow in the HFS plus filesystem (different issue than CVE-2009-4020) 844714 - CVE-2012-3412 kernel: sfc: potential remote denial of service through TCP MSS option 6. Package List: Red Hat Enterprise Linux EUS (v. 5.6 server): Source: kernel-2.6.18-238.45.1.el5.src.rpm i386: kernel-2.6.18-238.45.1.el5.i686.rpm kernel-PAE-2.6.18-238.45.1.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-238.45.1.el5.i686.rpm kernel-PAE-devel-2.6.18-238.45.1.el5.i686.rpm kernel-debug-2.6.18-238.45.1.el5.i686.rpm kernel-debug-debuginfo-2.6.18-238.45.1.el5.i686.rpm kernel-debug-devel-2.6.18-238.45.1.el5.i686.rpm kernel-debuginfo-2.6.18-238.45.1.el5.i686.rpm kernel-debuginfo-common-2.6.18-238.45.1.el5.i686.rpm kernel-devel-2.6.18-238.45.1.el5.i686.rpm kernel-headers-2.6.18-238.45.1.el5.i386.rpm kernel-xen-2.6.18-238.45.1.el5.i686.rpm kernel-xen-debuginfo-2.6.18-238.45.1.el5.i686.rpm kernel-xen-devel-2.6.18-238.45.1.el5.i686.rpm ia64: kernel-2.6.18-238.45.1.el5.ia64.rpm kernel-debug-2.6.18-238.45.1.el5.ia64.rpm kernel-debug-debuginfo-2.6.18-238.45.1.el5.ia64.rpm kernel-debug-devel-2.6.18-238.45.1.el5.ia64.rpm kernel-debuginfo-2.6.18-238.45.1.el5.ia64.rpm kernel-debuginfo-common-2.6.18-238.45.1.el5.ia64.rpm kernel-devel-2.6.18-238.45.1.el5.ia64.rpm kernel-headers-2.6.18-238.45.1.el5.ia64.rpm kernel-xen-2.6.18-238.45.1.el5.ia64.rpm kernel-xen-debuginfo-2.6.18-238.45.1.el5.ia64.rpm kernel-xen-devel-2.6.18-238.45.1.el5.ia64.rpm noarch: kernel-doc-2.6.18-238.45.1.el5.noarch.rpm ppc: kernel-2.6.18-238.45.1.el5.ppc64.rpm kernel-debug-2.6.18-238.45.1.el5.ppc64.rpm kernel-debug-debuginfo-2.6.18-238.45.1.el5.ppc64.rpm kernel-debug-devel-2.6.18-238.45.1.el5.ppc64.rpm kernel-debuginfo-2.6.18-238.45.1.el5.ppc64.rpm kernel-debuginfo-common-2.6.18-238.45.1.el5.ppc64.rpm kernel-devel-2.6.18-238.45.1.el5.ppc64.rpm kernel-headers-2.6.18-238.45.1.el5.ppc.rpm kernel-headers-2.6.18-238.45.1.el5.ppc64.rpm kernel-kdump-2.6.18-238.45.1.el5.ppc64.rpm kernel-kdump-debuginfo-2.6.18-238.45.1.el5.ppc64.rpm kernel-kdump-devel-2.6.18-238.45.1.el5.ppc64.rpm s390x: kernel-2.6.18-238.45.1.el5.s390x.rpm kernel-debug-2.6.18-238.45.1.el5.s390x.rpm kernel-debug-debuginfo-2.6.18-238.45.1.el5.s390x.rpm kernel-debug-devel-2.6.18-238.45.1.el5.s390x.rpm kernel-debuginfo-2.6.18-238.45.1.el5.s390x.rpm kernel-debuginfo-common-2.6.18-238.45.1.el5.s390x.rpm kernel-devel-2.6.18-238.45.1.el5.s390x.rpm kernel-headers-2.6.18-238.45.1.el5.s390x.rpm kernel-kdump-2.6.18-238.45.1.el5.s390x.rpm kernel-kdump-debuginfo-2.6.18-238.45.1.el5.s390x.rpm kernel-kdump-devel-2.6.18-238.45.1.el5.s390x.rpm x86_64: kernel-2.6.18-238.45.1.el5.x86_64.rpm kernel-debug-2.6.18-238.45.1.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-238.45.1.el5.x86_64.rpm kernel-debug-devel-2.6.18-238.45.1.el5.x86_64.rpm kernel-debuginfo-2.6.18-238.45.1.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-238.45.1.el5.x86_64.rpm kernel-devel-2.6.18-238.45.1.el5.x86_64.rpm kernel-headers-2.6.18-238.45.1.el5.x86_64.rpm kernel-xen-2.6.18-238.45.1.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-238.45.1.el5.x86_64.rpm kernel-xen-devel-2.6.18-238.45.1.el5.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-2012-2319.html https://www.redhat.com/security/data/cve/CVE-2012-3412.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) iD8DBQFQdAFXXlSAg2UNWIIRAmtrAJ4yUd3yYbh5rvQeaKGG/PxQANSKHgCgnSgA tSLZaKb0Jn/gx9w67mExRp4= =resj -----END PGP SIGNATURE-----