-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2011:1212-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1212.html Issue date: 2011-09-06 CVE Names: CVE-2011-2482 CVE-2011-2491 CVE-2011-2495 CVE-2011-2517 CVE-2011-2519 CVE-2011-2901 ===================================================================== 1. Summary: Updated kernel packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise Linux 5. 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 (v. 5 server) - i386, ia64, noarch, ppc, s390x, x86_64 Red Hat Enterprise Linux Desktop (v. 5 client) - i386, noarch, 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 NULL pointer dereference flaw was found in the Linux kernel's Stream Control Transmission Protocol (SCTP) implementation. A remote attacker could send a specially-crafted SCTP packet to a target system, resulting in a denial of service. (CVE-2011-2482, Important) * A flaw in the Linux kernel's client-side NFS Lock Manager (NLM) implementation could allow a local, unprivileged user to cause a denial of service. (CVE-2011-2491, Important) * Buffer overflow flaws in the Linux kernel's netlink-based wireless configuration interface implementation could allow a local user, who has the CAP_NET_ADMIN capability, to cause a denial of service or escalate their privileges on systems that have an active wireless interface. (CVE-2011-2517, Important) * A flaw was found in the way the Linux kernel's Xen hypervisor implementation emulated the SAHF instruction. When using a fully-virtualized guest on a host that does not use hardware assisted paging (HAP), such as those running CPUs that do not have support for (or those that have it disabled) Intel Extended Page Tables (EPT) or AMD Virtualization (AMD-V) Rapid Virtualization Indexing (RVI), a privileged guest user could trigger this flaw to cause the hypervisor to crash. (CVE-2011-2519, Moderate) * An off-by-one flaw was found in the __addr_ok() macro in the Linux kernel's Xen hypervisor implementation when running on 64-bit systems. A privileged guest user could trigger this flaw to cause the hypervisor to crash. (CVE-2011-2901, Moderate) * /proc/[PID]/io is world-readable by default. Previously, these files could be read without any further restrictions. A local, unprivileged user could read these files, belonging to other, possibly privileged processes to gather confidential information, such as the length of a password used in a process. (CVE-2011-2495, Low) Red Hat would like to thank Vasily Averin for reporting CVE-2011-2491, and Vasiliy Kulikov of Openwall for reporting CVE-2011-2495. This update also fixes several bugs. Documentation for these bug fixes will be available shortly from the Technical Notes document linked to in the References section. Users should upgrade to these updated packages, which contain backported patches to correct these issues, and fix the bugs noted in the Technical Notes. 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/kb/docs/DOC-11259 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/): 709393 - CVE-2011-2491 kernel: rpc task leak after flock()ing NFS share 712885 - RHEL6.1 32bit xen hvm guest crash randomly 714867 - CVE-2011-2482 kernel: sctp dos 716825 - CVE-2011-2495 kernel: /proc/PID/io infoleak 718152 - CVE-2011-2517 kernel: nl80211: missing check for valid SSID size in scan operations 718882 - CVE-2011-2519 kernel: xen: x86_emulate: fix SAHF emulation 727590 - [xfs] mis-sized O_DIRECT I/O results in hung task timeouts [rhel-5.7.z] 727835 - xfs_error_report() oops when passed-in mp is NULL [rhel-5.7.z] 728042 - CVE-2011-2901 kernel: xen: off-by-one shift in x86_64 __addr_ok() 6. Package List: Red Hat Enterprise Linux Desktop (v. 5 client): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/kernel-2.6.18-274.3.1.el5.src.rpm i386: kernel-2.6.18-274.3.1.el5.i686.rpm kernel-PAE-2.6.18-274.3.1.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-274.3.1.el5.i686.rpm kernel-PAE-devel-2.6.18-274.3.1.el5.i686.rpm kernel-debug-2.6.18-274.3.1.el5.i686.rpm kernel-debug-debuginfo-2.6.18-274.3.1.el5.i686.rpm kernel-debug-devel-2.6.18-274.3.1.el5.i686.rpm kernel-debuginfo-2.6.18-274.3.1.el5.i686.rpm kernel-debuginfo-common-2.6.18-274.3.1.el5.i686.rpm kernel-devel-2.6.18-274.3.1.el5.i686.rpm kernel-headers-2.6.18-274.3.1.el5.i386.rpm kernel-xen-2.6.18-274.3.1.el5.i686.rpm kernel-xen-debuginfo-2.6.18-274.3.1.el5.i686.rpm kernel-xen-devel-2.6.18-274.3.1.el5.i686.rpm noarch: kernel-doc-2.6.18-274.3.1.el5.noarch.rpm x86_64: kernel-2.6.18-274.3.1.el5.x86_64.rpm kernel-debug-2.6.18-274.3.1.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-274.3.1.el5.x86_64.rpm kernel-debug-devel-2.6.18-274.3.1.el5.x86_64.rpm kernel-debuginfo-2.6.18-274.3.1.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-274.3.1.el5.x86_64.rpm kernel-devel-2.6.18-274.3.1.el5.x86_64.rpm kernel-headers-2.6.18-274.3.1.el5.x86_64.rpm kernel-xen-2.6.18-274.3.1.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-274.3.1.el5.x86_64.rpm kernel-xen-devel-2.6.18-274.3.1.el5.x86_64.rpm Red Hat Enterprise Linux (v. 5 server): Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/kernel-2.6.18-274.3.1.el5.src.rpm i386: kernel-2.6.18-274.3.1.el5.i686.rpm kernel-PAE-2.6.18-274.3.1.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-274.3.1.el5.i686.rpm kernel-PAE-devel-2.6.18-274.3.1.el5.i686.rpm kernel-debug-2.6.18-274.3.1.el5.i686.rpm kernel-debug-debuginfo-2.6.18-274.3.1.el5.i686.rpm kernel-debug-devel-2.6.18-274.3.1.el5.i686.rpm kernel-debuginfo-2.6.18-274.3.1.el5.i686.rpm kernel-debuginfo-common-2.6.18-274.3.1.el5.i686.rpm kernel-devel-2.6.18-274.3.1.el5.i686.rpm kernel-headers-2.6.18-274.3.1.el5.i386.rpm kernel-xen-2.6.18-274.3.1.el5.i686.rpm kernel-xen-debuginfo-2.6.18-274.3.1.el5.i686.rpm kernel-xen-devel-2.6.18-274.3.1.el5.i686.rpm ia64: kernel-2.6.18-274.3.1.el5.ia64.rpm kernel-debug-2.6.18-274.3.1.el5.ia64.rpm kernel-debug-debuginfo-2.6.18-274.3.1.el5.ia64.rpm kernel-debug-devel-2.6.18-274.3.1.el5.ia64.rpm kernel-debuginfo-2.6.18-274.3.1.el5.ia64.rpm kernel-debuginfo-common-2.6.18-274.3.1.el5.ia64.rpm kernel-devel-2.6.18-274.3.1.el5.ia64.rpm kernel-headers-2.6.18-274.3.1.el5.ia64.rpm kernel-xen-2.6.18-274.3.1.el5.ia64.rpm kernel-xen-debuginfo-2.6.18-274.3.1.el5.ia64.rpm kernel-xen-devel-2.6.18-274.3.1.el5.ia64.rpm noarch: kernel-doc-2.6.18-274.3.1.el5.noarch.rpm ppc: kernel-2.6.18-274.3.1.el5.ppc64.rpm kernel-debug-2.6.18-274.3.1.el5.ppc64.rpm kernel-debug-debuginfo-2.6.18-274.3.1.el5.ppc64.rpm kernel-debug-devel-2.6.18-274.3.1.el5.ppc64.rpm kernel-debuginfo-2.6.18-274.3.1.el5.ppc64.rpm kernel-debuginfo-common-2.6.18-274.3.1.el5.ppc64.rpm kernel-devel-2.6.18-274.3.1.el5.ppc64.rpm kernel-headers-2.6.18-274.3.1.el5.ppc.rpm kernel-headers-2.6.18-274.3.1.el5.ppc64.rpm kernel-kdump-2.6.18-274.3.1.el5.ppc64.rpm kernel-kdump-debuginfo-2.6.18-274.3.1.el5.ppc64.rpm kernel-kdump-devel-2.6.18-274.3.1.el5.ppc64.rpm s390x: kernel-2.6.18-274.3.1.el5.s390x.rpm kernel-debug-2.6.18-274.3.1.el5.s390x.rpm kernel-debug-debuginfo-2.6.18-274.3.1.el5.s390x.rpm kernel-debug-devel-2.6.18-274.3.1.el5.s390x.rpm kernel-debuginfo-2.6.18-274.3.1.el5.s390x.rpm kernel-debuginfo-common-2.6.18-274.3.1.el5.s390x.rpm kernel-devel-2.6.18-274.3.1.el5.s390x.rpm kernel-headers-2.6.18-274.3.1.el5.s390x.rpm kernel-kdump-2.6.18-274.3.1.el5.s390x.rpm kernel-kdump-debuginfo-2.6.18-274.3.1.el5.s390x.rpm kernel-kdump-devel-2.6.18-274.3.1.el5.s390x.rpm x86_64: kernel-2.6.18-274.3.1.el5.x86_64.rpm kernel-debug-2.6.18-274.3.1.el5.x86_64.rpm kernel-debug-debuginfo-2.6.18-274.3.1.el5.x86_64.rpm kernel-debug-devel-2.6.18-274.3.1.el5.x86_64.rpm kernel-debuginfo-2.6.18-274.3.1.el5.x86_64.rpm kernel-debuginfo-common-2.6.18-274.3.1.el5.x86_64.rpm kernel-devel-2.6.18-274.3.1.el5.x86_64.rpm kernel-headers-2.6.18-274.3.1.el5.x86_64.rpm kernel-xen-2.6.18-274.3.1.el5.x86_64.rpm kernel-xen-debuginfo-2.6.18-274.3.1.el5.x86_64.rpm kernel-xen-devel-2.6.18-274.3.1.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-2011-2482.html https://www.redhat.com/security/data/cve/CVE-2011-2491.html https://www.redhat.com/security/data/cve/CVE-2011-2495.html https://www.redhat.com/security/data/cve/CVE-2011-2517.html https://www.redhat.com/security/data/cve/CVE-2011-2519.html https://www.redhat.com/security/data/cve/CVE-2011-2901.html https://access.redhat.com/security/updates/classification/#important https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/5/html/5.7_Technical_Notes/kernel.html#RHSA-2011-1212 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2011 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.4 (GNU/Linux) iD8DBQFOZp97XlSAg2UNWIIRAl6HAJ448Y45tpukFIai3463Z+ttCEzm/gCgv9PX 0jTLTpYmehlHG6s+bVc/ipQ= =ndTX -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce