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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0110 Important: kernel-rt security and bug fix update 29 January 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Impact/Access: Root Compromise -- Existing Account Access Privileged Data -- Existing Account Denial of Service -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2013-6431 CVE-2013-6383 CVE-2013-6378 CVE-2013-4470 CVE-2013-4270 CVE-2013-2930 CVE-2013-2929 Reference: ESB-2013.1789 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2014-0100.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2014:0100-01 Product: Red Hat Enterprise MRG for RHEL-6 Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0100.html Issue date: 2014-01-28 CVE Names: CVE-2013-2929 CVE-2013-2930 CVE-2013-4270 CVE-2013-4470 CVE-2013-6378 CVE-2013-6383 CVE-2013-6431 ===================================================================== 1. Summary: Updated kernel-rt packages that fix multiple security issues and several bugs are now available for Red Hat Enterprise MRG 2.4. 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: MRG Realtime for RHEL 6 Server v.2 - noarch, x86_64 3. Description: The kernel-rt packages contain the Linux kernel, the core of any Linux operating system. * A flaw was found in the way the Linux kernel's TCP/IP protocol suite implementation handled sending of certain UDP packets over sockets that used the UDP_CORK option when the UDP Fragmentation Offload (UFO) feature was enabled on the output device. A local, unprivileged user could use this flaw to cause a denial of service or, potentially, escalate their privileges on the system. (CVE-2013-4470, Important) * A flaw was found in the way the perf_trace_event_perm() function in the Linux kernel checked permissions for the function tracer functionality. An unprivileged local user could use this flaw to enable function tracing and cause a denial of service on the system. (CVE-2013-2930, Moderate) * A flaw was found in the way the net_ctl_permissions() function in the Linux kernel checked access permissions. A local, unprivileged user could potentially use this flaw to access certain files in /proc/sys/net regardless of the underlying file system permissions. (CVE-2013-4270, Moderate) * A flaw was found in the way the Linux kernel's Adaptec RAID controller (aacraid) checked permissions of compat IOCTLs. A local attacker could use this flaw to bypass intended security restrictions. (CVE-2013-6383, Moderate) * A flaw was found in the way the get_dumpable() function return value was interpreted in the ptrace subsystem of the Linux kernel. When 'fs.suid_dumpable' was set to 2, a local, unprivileged local user could use this flaw to bypass intended ptrace restrictions and obtain potentially sensitive information. (CVE-2013-2929, Low) * An invalid pointer dereference flaw was found in the Marvell 8xxx Libertas WLAN (libertas) driver in the Linux kernel. A local user able to write to a file that is provided by the libertas driver and located on the debug file system (debugfs) could use this flaw to crash the system. Note: The debugfs file system must be mounted locally to exploit this issue. It is not mounted by default. (CVE-2013-6378, Low) * A NULL pointer dereference flaw was found in the Linux kernel's IPv6 source address-based routing implementation. A local attacker who has the CAP_NET_ADMIN capability could use this flaw to crash the system. (CVE-2013-6431, Low) Red Hat would like to thank Hannes Frederic Sowa for reporting CVE-2013-4470. The CVE-2013-4270 issue was discovered by Miroslav Vadkerti of Red Hat. This update also fixes multiple 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 upgrade the kernel-rt kernel to version kernel-rt-3.8.13-rt27, correct these issues, and fix the bugs noted in the Red Hat Enterprise MRG 2 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/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/): 1016729 - Apply IB performance patches to 3.8 realtime kernel 1023477 - CVE-2013-4470 Kernel: net: memory corruption with UDP_CORK and UFO 1027752 - CVE-2013-4270 kernel: net: permissions flaw in /proc/sys/net 1027778 - CVE-2013-2930 kernel: perf/ftrace: insufficient check in perf_trace_event_perm() 1028148 - CVE-2013-2929 kernel: exec/ptrace: get_dumpable() incorrect tests 1033530 - CVE-2013-6383 Kernel: AACRAID Driver compat IOCTL missing capability check 1033578 - CVE-2013-6378 Kernel: drivers: libertas: potential oops in debugfs 1037770 - Recent -rt kernels compiled without CONFIG_NETFILTER_XT_MATCH_ADDRTYPE 1039054 - CVE-2013-6431 kernel: net: fib: fib6_add: potential NULL pointer dereference 1039743 - kernel: panic when unloading ip6_tunnel module 6. Package List: MRG Realtime for RHEL 6 Server v.2: Source: ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RHEMRG-RHEL6/SRPMS/kernel-rt-3.8.13-rt27.33.el6rt.src.rpm noarch: kernel-rt-doc-3.8.13-rt27.33.el6rt.noarch.rpm kernel-rt-firmware-3.8.13-rt27.33.el6rt.noarch.rpm x86_64: kernel-rt-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-debug-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-debug-debuginfo-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-debug-devel-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-debuginfo-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-devel-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-trace-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-trace-debuginfo-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-trace-devel-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-vanilla-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-vanilla-debuginfo-3.8.13-rt27.33.el6rt.x86_64.rpm kernel-rt-vanilla-devel-3.8.13-rt27.33.el6rt.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-2013-2929.html https://www.redhat.com/security/data/cve/CVE-2013-2930.html https://www.redhat.com/security/data/cve/CVE-2013-4270.html https://www.redhat.com/security/data/cve/CVE-2013-4470.html https://www.redhat.com/security/data/cve/CVE-2013-6378.html https://www.redhat.com/security/data/cve/CVE-2013-6383.html https://www.redhat.com/security/data/cve/CVE-2013-6431.html https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/site/documentation/en-US/Red_Hat_Enterprise_MRG/2/html/Technical_Notes/RHSA-2014-0100.html 8. Contact: The Red Hat security contact is <secalert@redhat.com>. 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) iD8DBQFS5+4QXlSAg2UNWIIRAk69AKCIJ+KWTW4FueOZ7VTCacRd78NcvACeImdx FPo19nKq6xu6YEH7IKNduE4= =U6os - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBUuhYHxLndAQH1ShLAQI49A/+KSg+Ya+ojAsxXI6z6TlwtkUziJjU/qZN cjWWh35JToZLfLswYRT3BWJjA7aIv/sRz1IgcBPR79N/uKHB4B+Lnru3f8Kjqddo wvOk6EfIC46VVAMvjluNtxXgor5X4VmkZyXm31hIUzcCJmZ/4d89qJKc6EBedtzE JDdjSlIkOY2qldcj/I8QLoXZdGbAlzEwY721gPpf7IpPkyWbOwpUnXvpGe93rGMR FEM+zZdyqIQZb5V/Met28qQ/Z7xG9DP4HJVcuHs8bgc8kzGCXvEgoAg1lsIzZEUP 16gKjs3Q0o6iEKATMft5mUPIwZW77JBANxXAoa13hWPubRf0D+YhPPTha+wMOn+J V61+tSRRYOpByqfIhIkR8hxgSfWekrHyflkjiE5JKg35X6Lf+tcUuFzqkf41DwYM RpfhErWQpiwe41H5gjF6jAG9vvhRk5llemjGghTvW4Toj0MdvgO/cusukEu5mjtD WewpmN/bX9S2oMdmxK1mCFZnwY3kefnjCqOu7/3oRlnCwTei0g5s631nwoFa8GH/ G2gKlG67DDQL/BzidXf7sSzE5WqOxFsbUh2WZEIKZus0R//5QVJStkeLhVmyqxmt /BNMM5GMRnAEDrrJHXsrlaoLMYgY2tPDH1aYhvsbwN8bqN0v85OZ6XtRF2ghupSN OwKBBqJnJU0= =5aE3 -----END PGP SIGNATURE-----