The kernel packages contain the Linux kernel, the core of any Linux operating system. The proc file system could allow a local, unprivileged user to obtain sensitive information or possibly cause integrity issues. Non-member VLAN (virtual LAN) packet handling for interfaces in promiscuous mode and also using the be2net driver could allow an attacker on the local network to cause a denial of service. A missing validation flaw was found in the
m_stop() implementation. A local, unprivileged user could use this flaw to trigger a denial of service.
A flaw was found in the way splitting two extents in
ext4_ext_convert_to_initialized() worked. A local, unprivileged user with the ability to mount and unmount ext4 file systems could use this flaw to cause a denial of service. A NULL pointer dereference flaw was found in the way the key management facility handled user-defined key types. A local, unprivileged user could use the keyctl utility to cause a denial of service.
Updated packages are available from ftp.redhat.com.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Moderate: kernel security and bug fix update Advisory ID: RHSA-2012:0116-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0116.html Issue date: 2012-02-14 CVE Names: CVE-2011-1020 CVE-2011-3347 CVE-2011-3637 CVE-2011-3638 CVE-2011-4110 ===================================================================== 1. Summary: Updated kernel packages that fix various security issues and several bugs are now available for Red Hat Enterprise Linux 6.1 Extended Update Support. The Red Hat Security Response Team has rated this update as having moderate 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 Server EUS (v. 6.1) - 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 issues: * The proc file system could allow a local, unprivileged user to obtain sensitive information or possibly cause integrity issues. (CVE-2011-1020, Moderate) * Non-member VLAN (virtual LAN) packet handling for interfaces in promiscuous mode and also using the be2net driver could allow an attacker on the local network to cause a denial of service. (CVE-2011-3347, Moderate) * A missing validation flaw was found in the Linux kernel's m_stop() implementation. A local, unprivileged user could use this flaw to trigger a denial of service. (CVE-2011-3637, Moderate) * A flaw was found in the Linux kernel in the way splitting two extents in ext4_ext_convert_to_initialized() worked. A local, unprivileged user with the ability to mount and unmount ext4 file systems could use this flaw to cause a denial of service. (CVE-2011-3638, Moderate) * A NULL pointer dereference flaw was found in the way the Linux kernel's key management facility handled user-defined key types. A local, unprivileged user could use the keyctl utility to cause a denial of service. (CVE-2011-4110, Moderate) Red Hat would like to thank Kees Cook for reporting CVE-2011-1020; Somnath Kotur for reporting CVE-2011-3347; and Zheng Liu for reporting CVE-2011-3638. This update also fixes several bugs. Documentation for these changes 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/): 680358 - CVE-2011-1020 kernel: no access restrictions of /proc/pid/* after setuid program exec 736425 - CVE-2011-3347 kernel: be2net: promiscuous mode and non-member VLAN packets DoS 747848 - CVE-2011-3637 kernel: proc: fix oops on invalid /proc/<pid>/maps access 747942 - CVE-2011-3638 kernel: ext4: ext4_ext_insert_extent() kernel oops 751297 - CVE-2011-4110 kernel: keys: NULL pointer deref in the user-defined key type 6. Package List: Red Hat Enterprise Linux Server EUS (v. 6.1): Source: kernel-2.6.32-131.25.1.el6.src.rpm i386: kernel-2.6.32-131.25.1.el6.i686.rpm kernel-debug-2.6.32-131.25.1.el6.i686.rpm kernel-debug-debuginfo-2.6.32-131.25.1.el6.i686.rpm kernel-debug-devel-2.6.32-131.25.1.el6.i686.rpm kernel-debuginfo-2.6.32-131.25.1.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-131.25.1.el6.i686.rpm kernel-devel-2.6.32-131.25.1.el6.i686.rpm kernel-headers-2.6.32-131.25.1.el6.i686.rpm perf-2.6.32-131.25.1.el6.i686.rpm perf-debuginfo-2.6.32-131.25.1.el6.i686.rpm noarch: kernel-doc-2.6.32-131.25.1.el6.noarch.rpm kernel-firmware-2.6.32-131.25.1.el6.noarch.rpm ppc64: kernel-2.6.32-131.25.1.el6.ppc64.rpm kernel-bootwrapper-2.6.32-131.25.1.el6.ppc64.rpm kernel-debug-2.6.32-131.25.1.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-131.25.1.el6.ppc64.rpm kernel-debug-devel-2.6.32-131.25.1.el6.ppc64.rpm kernel-debuginfo-2.6.32-131.25.1.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-131.25.1.el6.ppc64.rpm kernel-devel-2.6.32-131.25.1.el6.ppc64.rpm kernel-headers-2.6.32-131.25.1.el6.ppc64.rpm perf-2.6.32-131.25.1.el6.ppc64.rpm perf-debuginfo-2.6.32-131.25.1.el6.ppc64.rpm s390x: kernel-2.6.32-131.25.1.el6.s390x.rpm kernel-debug-2.6.32-131.25.1.el6.s390x.rpm kernel-debug-debuginfo-2.6.32-131.25.1.el6.s390x.rpm kernel-debug-devel-2.6.32-131.25.1.el6.s390x.rpm kernel-debuginfo-2.6.32-131.25.1.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-131.25.1.el6.s390x.rpm kernel-devel-2.6.32-131.25.1.el6.s390x.rpm kernel-headers-2.6.32-131.25.1.el6.s390x.rpm kernel-kdump-2.6.32-131.25.1.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-131.25.1.el6.s390x.rpm kernel-kdump-devel-2.6.32-131.25.1.el6.s390x.rpm perf-2.6.32-131.25.1.el6.s390x.rpm perf-debuginfo-2.6.32-131.25.1.el6.s390x.rpm x86_64: kernel-2.6.32-131.25.1.el6.x86_64.rpm kernel-debug-2.6.32-131.25.1.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-131.25.1.el6.x86_64.rpm kernel-debug-devel-2.6.32-131.25.1.el6.x86_64.rpm kernel-debuginfo-2.6.32-131.25.1.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-131.25.1.el6.x86_64.rpm kernel-devel-2.6.32-131.25.1.el6.x86_64.rpm kernel-headers-2.6.32-131.25.1.el6.x86_64.rpm perf-2.6.32-131.25.1.el6.x86_64.rpm perf-debuginfo-2.6.32-131.25.1.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-2011-1020.html https://www.redhat.com/security/data/cve/CVE-2011-3347.html https://www.redhat.com/security/data/cve/CVE-2011-3637.html https://www.redhat.com/security/data/cve/CVE-2011-3638.html https://www.redhat.com/security/data/cve/CVE-2011-4110.html https://access.redhat.com/security/updates/classification/#moderate https://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.1_Technical_Notes/kernel.html#RHSA-2012-0116 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) iD8DBQFPOwDxXlSAg2UNWIIRApPLAKCtwFsAQX7Xl6xvhILWx8bT9quG5wCfTKqK H8P+nqksU3gf3Yw/DN/q15k= =NhH2 -----END PGP SIGNATURE-----