-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2014:0520-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0520.html Issue date: 2014-05-20 CVE Names: CVE-2014-0101 CVE-2014-0196 ===================================================================== 1. Summary: Updated kernel packages that fix two security issues and one bug are now available for Red Hat Enterprise Linux 6.2 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 AUS (v. 6.2 server) - noarch, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 6.2) - x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. * A flaw was found in the way the Linux kernel processed an authenticated COOKIE_ECHO chunk during the initialization of an SCTP connection. A remote attacker could use this flaw to crash the system by initiating a specially crafted SCTP handshake in order to trigger a NULL pointer dereference on the system. (CVE-2014-0101, Important) * A race condition flaw, leading to heap-based buffer overflows, was found in the way the Linux kernel's N_TTY line discipline (LDISC) implementation handled concurrent processing of echo output and TTY write operations originating from user space when the underlying TTY driver was PTY. An unprivileged, local user could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-0196, Important) Red Hat would like to thank Nokia Siemens Networks for reporting CVE-2014-0101. This update also fixes the following bug: * Prior to this update, a guest-provided value was used as the head length of the socket buffer allocated on the host. If the host was under heavy memory load and the guest-provided value was too large, the allocation could have failed, resulting in stalls and packet drops in the guest's Tx path. With this update, the guest-provided value has been limited to a reasonable size so that socket buffer allocations on the host succeed regardless of the memory load on the host, and guests can send packets without experiencing packet drops or stalls. (BZ#1092349) All kernel users are advised to 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/site/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 (https://bugzilla.redhat.com/): 1070705 - CVE-2014-0101 kernel: net: sctp: null pointer dereference when processing authenticated cookie_echo chunk 1094232 - CVE-2014-0196 kernel: pty layer race condition leading to memory corruption 6. Package List: Red Hat Enterprise Linux AUS (v. 6.2 server): Source: kernel-2.6.32-220.51.1.el6.src.rpm noarch: kernel-doc-2.6.32-220.51.1.el6.noarch.rpm kernel-firmware-2.6.32-220.51.1.el6.noarch.rpm x86_64: kernel-2.6.32-220.51.1.el6.x86_64.rpm kernel-debug-2.6.32-220.51.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-220.51.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-220.51.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-220.51.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-220.51.1.el6.x86_64.rpm kernel-devel-2.6.32-220.51.1.el6.x86_64.rpm kernel-headers-2.6.32-220.51.1.el6.x86_64.rpm perf-2.6.32-220.51.1.el6.x86_64.rpm perf-debuginfo-2.6.32-220.51.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-220.51.1.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 6.2): Source: kernel-2.6.32-220.51.1.el6.src.rpm x86_64: kernel-debug-debuginfo-2.6.32-220.51.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-220.51.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-220.51.1.el6.x86_64.rpm perf-debuginfo-2.6.32-220.51.1.el6.x86_64.rpm python-perf-2.6.32-220.51.1.el6.x86_64.rpm python-perf-debuginfo-2.6.32-220.51.1.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-2014-0101.html https://www.redhat.com/security/data/cve/CVE-2014-0196.html https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2014 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFTezblXlSAg2UNWIIRAmwqAJ4iqO38Q7yoerug1+H3HoqaDatihQCglxfr WO2lCHAkHLamTSZIOqFVk6Q= =ofqj -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce