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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0612 Important: kernel-rt security, bug fix, and enhancement update 29 April 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel-rt Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 6 Impact/Access: Root Compromise -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-2523 CVE-2014-2309 CVE-2014-1874 CVE-2014-1690 CVE-2014-1438 CVE-2014-0069 CVE-2013-7265 CVE-2013-7263 Reference: ESB-2014.0592 ESB-2014.0417 ESB-2014.0390 ESB-2014.0329 ESB-2014.0188 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2014-0439.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security, bug fix, and enhancement update Advisory ID: RHSA-2014:0439-01 Product: Red Hat Enterprise MRG for RHEL-6 Advisory URL: https://rhn.redhat.com/errata/RHSA-2014-0439.html Issue date: 2014-04-28 CVE Names: CVE-2013-7263 CVE-2013-7265 CVE-2014-0069 CVE-2014-1438 CVE-2014-1690 CVE-2014-1874 CVE-2014-2309 CVE-2014-2523 ===================================================================== 1. Summary: Updated kernel-rt packages that fix multiple security issues, several bugs, and add various enhancements are now available for Red Hat Enterprise MRG 2.5. 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: 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 denial of service flaw was found in the way the Linux kernel's IPv6 implementation processed IPv6 router advertisement (RA) packets. An attacker able to send a large number of RA packets to a target system could potentially use this flaw to crash the target system. (CVE-2014-2309, Important) * A flaw was found in the way the Linux kernel's netfilter connection tracking implementation for Datagram Congestion Control Protocol (DCCP) packets used the skb_header_pointer() function. A remote attacker could use this flaw to send a specially crafted DCCP packet to crash the system or, potentially, escalate their privileges on the system. (CVE-2014-2523, Important) * A flaw was found in the way the Linux kernel's CIFS implementation handled uncached write operations with specially crafted iovec structures. An unprivileged local user with access to a CIFS share could use this flaw to crash the system, leak kernel memory, or, potentially, escalate their privileges on the system. (CVE-2014-0069, Moderate) * A flaw was found in the way the Linux kernel handled pending Floating Pointer Unit (FPU) exceptions during the switching of tasks. A local attacker could use this flaw to terminate arbitrary processes on the system, causing a denial of service, or, potentially, escalate their privileges on the system. Note that this flaw only affected systems using AMD CPUs on both 32-bit and 64-bit architectures. (CVE-2014-1438, Moderate) * It was found that certain protocol handlers in the Linux kernel's networking implementation could set the addr_len value without initializing the associated data structure. A local, unprivileged user could use this flaw to leak kernel stack memory to user space using the recvmsg, recvfrom, and recvmmsg system calls. (CVE-2013-7263, CVE-2013-7265, Low) * An information leak flaw was found in the Linux kernel's netfilter connection tracking IRC NAT helper implementation that could allow a remote attacker to disclose portions of kernel stack memory during IRC DCC (Direct Client-to-Client) communication over NAT. (CVE-2014-1690, Low) * A denial of service flaw was discovered in the way the Linux kernel's SELinux implementation handled files with an empty SELinux security context. A local user who has the CAP_MAC_ADMIN capability could use this flaw to crash the system. (CVE-2014-1874, Low) Red Hat would like to thank Al Viro for reporting CVE-2014-0069. The CVE-2014-1690 issue was discovered by Daniel Borkmann of Red Hat. This update also fixes several bugs and adds multiple enhancements. Documentation for these changes will be available shortly from the Technical Notes document linked to in the References section. Users are advised to upgrade to these updated packages, which upgrade the kernel-rt kernel to version kernel-rt-3.10.33-rt32.33, correct these issues, and fix the bugs and add the enhancements 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/): 1016735 - Apply IB performance patches to 3.10 realtime kernel 1032245 - RFE: rebase to a 3.10 kernel 1035875 - CVE-2013-7263 CVE-2013-7265 Kernel: net: leakage of uninitialized memory to user-space via recv syscalls 1052914 - CVE-2014-1438 kernel: x86: exceptions are not cleared in AMD FXSAVE workaround 1058748 - CVE-2014-1690 Kernel: netfilter: nf_nat: leakage of uninitialized buffer in IRC NAT helper 1058848 - Panic on unload of sit module unload and reading of /proc/<pid>/net/dev 1062356 - CVE-2014-1874 Kernel: SELinux: local denial-of-service 1064253 - CVE-2014-0069 kernel: cifs: incorrect handling of bogus user pointers during uncached writes 1067880 - hpsa driver version regression in MRG 2.5 kernel 1074471 - CVE-2014-2309 Kernel: net: IPv6: crash due to router advertisement flooding 1077343 - CVE-2014-2523 kernel: netfilter: nf_conntrack_dccp: incorrect skb_header_pointer API usages 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-3.10.33-rt32.33.el6rt.src.rpm noarch: kernel-rt-doc-3.10.33-rt32.33.el6rt.noarch.rpm kernel-rt-firmware-3.10.33-rt32.33.el6rt.noarch.rpm x86_64: kernel-rt-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-debug-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-debug-debuginfo-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-debug-devel-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-debuginfo-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-devel-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-trace-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-trace-debuginfo-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-trace-devel-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-vanilla-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-vanilla-debuginfo-3.10.33-rt32.33.el6rt.x86_64.rpm kernel-rt-vanilla-devel-3.10.33-rt32.33.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-2013-7263.html https://www.redhat.com/security/data/cve/CVE-2013-7265.html https://www.redhat.com/security/data/cve/CVE-2014-0069.html https://www.redhat.com/security/data/cve/CVE-2014-1438.html https://www.redhat.com/security/data/cve/CVE-2014-1690.html https://www.redhat.com/security/data/cve/CVE-2014-1874.html https://www.redhat.com/security/data/cve/CVE-2014-2309.html https://www.redhat.com/security/data/cve/CVE-2014-2523.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/index.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) iD8DBQFTXoY4XlSAg2UNWIIRAv8wAJoCQLJndGV/cFztv5qJxzig1a0mmwCcCzy5 xdeB2TpeTbTTq8XcXQJFW4E= =JbKa - -----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 iQIVAwUBU18KwhLndAQH1ShLAQLsGg/5Aft8ozW0jaRK4hLN+XUBmwwy99FGD2UN YmkEaH0sfP6i2Z4Q2lrgqzjxT2l/fnAqrC847kNxmZMKhUiAWeFIKrrTBey1MlCM tgnRc4J4pPpNP9p6ibG49yp7YF23+Kb1n8mZHv3kSt7VDKn338uEGTD0bIqMRczB dbqFTD2nnRXRJ/KgjXsETOvx3DogPqVoQumkOFg2tFQt35mmW0rhNrTToehYJ0pI szaylA9VvCKeCrSGM8lO67VpzxKVSJ0TmOcc++RrXFZ1yQU3++4tX1aGDk9g+Wi9 ETMbX9Zt7ArfpJdKDtEewnaWnQzIf57j189lxnEhH4ABRPM9JMs0pKrx11/NpY9/ 2ZXF5/jsmvoFeQ78O0W5R96wmhb3IGiCgei8x8kbvrTJxjwqY7LnRksWJh9XSAjz K6nMlYYwSbU3BoBO9Om0oTgWnKJqYh/zTxWZdTVpnORz7n6+btzAgvC1VuPs0zCQ CwoTSOTiO/AhxftJyUnZMPKpr19v4BP5Xr9zUpBdsrcbz/IeQPYsG4gax05pVmrA Yj4CRRg81URSVOz5keKGkUnDPdD/dUUCWXYIVrlF9+LiV0HdzL2FNZEpl4y7lrmO 8/kBwOQ5fkndQG7GzTdhNpp2xSIjTd5ErzpM8zx7+4IIrJEfeA5PjZxoDYsHANu9 Bjcl//ShPXI= =q+G3 -----END PGP SIGNATURE-----