Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.0131 Important: kernel security, bug fix, and enhancement update 18 January 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: kernel Publisher: Red Hat Operating System: Red Hat Enterprise Linux Server 7 Red Hat Enterprise Linux WS/Desktop 7 Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2016-9555 CVE-2016-7117 CVE-2016-6828 Reference: ESB-2017.0072 ESB-2017.0029 ASB-2016.0103 ASB-2016.0093 Original Bulletin: https://rhn.redhat.com/errata/RHSA-2017-0086.html - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel security, bug fix, and enhancement update Advisory ID: RHSA-2017:0086-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2017-0086.html Issue date: 2017-01-17 CVE Names: CVE-2016-6828 CVE-2016-7117 CVE-2016-9555 ===================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Client (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Client Optional (v. 7) - x86_64 Red Hat Enterprise Linux ComputeNode (v. 7) - noarch, x86_64 Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64 Red Hat Enterprise Linux Server (v. 7) - noarch, ppc64, ppc64le, s390x, x86_64 Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, x86_64 Red Hat Enterprise Linux Workstation (v. 7) - noarch, x86_64 Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. These updated kernel packages include several security issues and numerous bug fixes, some of which you can see below. Space precludes documenting all of these bug fixes in this advisory. To see the complete list of bug fixes, users are directed to the related Knowledge Article: https://access.redhat.com/articles/2857831. Security Fix(es): * A use-after-free vulnerability was found in the kernel's socket recvmmsg subsystem. This may allow remote attackers to corrupt memory and may allow execution of arbitrary code. This corruption takes place during the error handling routines within __sys_recvmmsg() function. (CVE-2016-7117, Important) * A use-after-free vulnerability was found in tcp_xmit_retransmit_queue and other tcp_* functions. This condition could allow an attacker to send an incorrect selective acknowledgment to existing connections, possibly resetting a connection. (CVE-2016-6828, Moderate) * A flaw was found in the Linux kernel's implementation of the SCTP protocol. A remote attacker could trigger an out-of-bounds read with an offset of up to 64kB potentially causing the system to crash. (CVE-2016-9555, Moderate) Bug Fix(es): * Previously, the performance of Internet Protocol over InfiniBand (IPoIB) was suboptimal due to a conflict of IPoIB with the Generic Receive Offload (GRO) infrastructure. With this update, the data cached by the IPoIB driver has been moved from a control block into the IPoIB hard header, thus avoiding the GRO problem and the corruption of IPoIB address information. As a result, the performance of IPoIB has been improved. (BZ#1390668) * Previously, when a virtual machine (VM) with PCI-Passthrough interfaces was recreated, a race condition between the eventfd daemon and the virqfd daemon occurred. Consequently, the operating system rebooted. This update fixes the race condition. As a result, the operating system no longer reboots in the described situation. (BZ#1391611) * Previously, a packet loss occurred when the team driver in round-robin mode was sending a large number of packets. This update fixes counting of the packets in the round-robin runner of the team driver, and the packet loss no longer occurs in the described situation. (BZ#1392023) * Previously, the virtual network devices contained in the deleted namespace could be deleted in any order. If the loopback device was not deleted as the last item, other netns devices, such as vxlan devices, could end up with dangling references to the loopback device. Consequently, deleting a network namespace (netns) occasionally ended by a kernel oops. With this update, the underlying source code has been fixed to ensure the correct order when deleting the virtual network devices on netns deletion. As a result, the kernel oops no longer occurs under the described circumstances. (BZ#1392024) * Previously, a Kabylake system with a Sunrise Point Platform Controller Hub (PCH) with a PCI device ID of 0xA149 showed the following warning messages during the boot: "Unknown Intel PCH (0xa149) detected." "Warning: Intel Kabylake processor with unknown PCH - this hardware has not undergone testing by Red Hat and might not be certified. Please consult https://hardware.redhat.com for certified hardware." The messages were shown because this PCH was not properly recognized. With this update, the problem has been fixed, and the operating system now boots without displaying the warning messages. (BZ#1392033) * Previously, the operating system occasionally became unresponsive after a long run. This was caused by a race condition between the try_to_wake_up() function and a woken up task in the core scheduler. With this update, the race condition has been fixed, and the operating system no longer locks up in the described scenario. (BZ#1393719) 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. 5. Bugs fixed (https://bugzilla.redhat.com/): 1367091 - CVE-2016-6828 kernel: Use after free in tcp_xmit_retransmit_queue 1382268 - CVE-2016-7117 kernel: Use-after-free in the recvmmsg exit path 1397930 - CVE-2016-9555 kernel: Slab out-of-bounds access in sctp_sf_ootb() 6. Package List: Red Hat Enterprise Linux Client (v. 7): Source: kernel-3.10.0-514.6.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-514.6.1.el7.noarch.rpm kernel-doc-3.10.0-514.6.1.el7.noarch.rpm x86_64: kernel-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm kernel-devel-3.10.0-514.6.1.el7.x86_64.rpm kernel-headers-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.6.1.el7.x86_64.rpm perf-3.10.0-514.6.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm python-perf-3.10.0-514.6.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm Red Hat Enterprise Linux Client Optional (v. 7): x86_64: kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.6.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode (v. 7): Source: kernel-3.10.0-514.6.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-514.6.1.el7.noarch.rpm kernel-doc-3.10.0-514.6.1.el7.noarch.rpm x86_64: kernel-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm kernel-devel-3.10.0-514.6.1.el7.x86_64.rpm kernel-headers-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.6.1.el7.x86_64.rpm perf-3.10.0-514.6.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm python-perf-3.10.0-514.6.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm Red Hat Enterprise Linux ComputeNode Optional (v. 7): x86_64: kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.6.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm Red Hat Enterprise Linux Server (v. 7): Source: kernel-3.10.0-514.6.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-514.6.1.el7.noarch.rpm kernel-doc-3.10.0-514.6.1.el7.noarch.rpm ppc64: kernel-3.10.0-514.6.1.el7.ppc64.rpm kernel-bootwrapper-3.10.0-514.6.1.el7.ppc64.rpm kernel-debug-3.10.0-514.6.1.el7.ppc64.rpm kernel-debug-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm kernel-debug-devel-3.10.0-514.6.1.el7.ppc64.rpm kernel-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-514.6.1.el7.ppc64.rpm kernel-devel-3.10.0-514.6.1.el7.ppc64.rpm kernel-headers-3.10.0-514.6.1.el7.ppc64.rpm kernel-tools-3.10.0-514.6.1.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm kernel-tools-libs-3.10.0-514.6.1.el7.ppc64.rpm perf-3.10.0-514.6.1.el7.ppc64.rpm perf-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm python-perf-3.10.0-514.6.1.el7.ppc64.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm ppc64le: kernel-3.10.0-514.6.1.el7.ppc64le.rpm kernel-bootwrapper-3.10.0-514.6.1.el7.ppc64le.rpm kernel-debug-3.10.0-514.6.1.el7.ppc64le.rpm kernel-debug-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-514.6.1.el7.ppc64le.rpm kernel-devel-3.10.0-514.6.1.el7.ppc64le.rpm kernel-headers-3.10.0-514.6.1.el7.ppc64le.rpm kernel-tools-3.10.0-514.6.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm kernel-tools-libs-3.10.0-514.6.1.el7.ppc64le.rpm perf-3.10.0-514.6.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm python-perf-3.10.0-514.6.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm s390x: kernel-3.10.0-514.6.1.el7.s390x.rpm kernel-debug-3.10.0-514.6.1.el7.s390x.rpm kernel-debug-debuginfo-3.10.0-514.6.1.el7.s390x.rpm kernel-debug-devel-3.10.0-514.6.1.el7.s390x.rpm kernel-debuginfo-3.10.0-514.6.1.el7.s390x.rpm kernel-debuginfo-common-s390x-3.10.0-514.6.1.el7.s390x.rpm kernel-devel-3.10.0-514.6.1.el7.s390x.rpm kernel-headers-3.10.0-514.6.1.el7.s390x.rpm kernel-kdump-3.10.0-514.6.1.el7.s390x.rpm kernel-kdump-debuginfo-3.10.0-514.6.1.el7.s390x.rpm kernel-kdump-devel-3.10.0-514.6.1.el7.s390x.rpm perf-3.10.0-514.6.1.el7.s390x.rpm perf-debuginfo-3.10.0-514.6.1.el7.s390x.rpm python-perf-3.10.0-514.6.1.el7.s390x.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.s390x.rpm x86_64: kernel-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm kernel-devel-3.10.0-514.6.1.el7.x86_64.rpm kernel-headers-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.6.1.el7.x86_64.rpm perf-3.10.0-514.6.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm python-perf-3.10.0-514.6.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm Red Hat Enterprise Linux Server Optional (v. 7): ppc64: kernel-debug-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm kernel-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm kernel-debuginfo-common-ppc64-3.10.0-514.6.1.el7.ppc64.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm kernel-tools-libs-devel-3.10.0-514.6.1.el7.ppc64.rpm perf-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.ppc64.rpm ppc64le: kernel-debug-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm kernel-debug-devel-3.10.0-514.6.1.el7.ppc64le.rpm kernel-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm kernel-debuginfo-common-ppc64le-3.10.0-514.6.1.el7.ppc64le.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm kernel-tools-libs-devel-3.10.0-514.6.1.el7.ppc64le.rpm perf-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.ppc64le.rpm x86_64: kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.6.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm Red Hat Enterprise Linux Workstation (v. 7): Source: kernel-3.10.0-514.6.1.el7.src.rpm noarch: kernel-abi-whitelists-3.10.0-514.6.1.el7.noarch.rpm kernel-doc-3.10.0-514.6.1.el7.noarch.rpm x86_64: kernel-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm kernel-devel-3.10.0-514.6.1.el7.x86_64.rpm kernel-headers-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-514.6.1.el7.x86_64.rpm perf-3.10.0-514.6.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm python-perf-3.10.0-514.6.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm Red Hat Enterprise Linux Workstation Optional (v. 7): x86_64: kernel-debug-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-debuginfo-common-x86_64-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm kernel-tools-libs-devel-3.10.0-514.6.1.el7.x86_64.rpm perf-debuginfo-3.10.0-514.6.1.el7.x86_64.rpm python-perf-debuginfo-3.10.0-514.6.1.el7.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/ 7. References: https://access.redhat.com/security/cve/CVE-2016-6828 https://access.redhat.com/security/cve/CVE-2016-7117 https://access.redhat.com/security/cve/CVE-2016-9555 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/articles/2857831 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2017 Red Hat, Inc. - -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFYfm50XlSAg2UNWIIRAmyQAJ94OnL9F0NIJ2FwETONhikS1ASVVgCeKwEP v7tgVk7weRvbe4vZaHieogI= =KiPw - -----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. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWH6nI4x+lLeg9Ub1AQjd+Q/9G+Gs7O2fIF0JrJJQYLr9fQ0ejb2ebT1N y/jfTHh59A6KbERsomyDSSZ3u/zwkXDj0S3VKrx9YJWK9ykzOaVtiG4wYWumD9PR cN0nRewVYdwOYWxG+ZikTqSiwtVwUeVg6Z0/lmhmojhbfkcPO0qf6PxKP5V5Et2k hHf28Y6c0qjsR87j8n/Pql+1pgMDRrhPbRCShIPrmfGWtugChHWaJWs1sUe+wR73 bIPQTXxOoV+XEllhuzVmCRaLaGmfcq3QFTxMn6BerTUBgo6yCkR9rZX8CrFXl+lx IkSU1ys5kyL9RbIWIbjhd1bRhvX7q5ZhZp584gknCkzHB2OKjMYuUyQWjo1PbeLt TcqtEUqtiYpg6oJ9XmweRUXtgT8pYpwjlJ4zV9fqbj4JSgmqSlz3VnfdvjSOCNle Z9rCmPZU7UZV8inJkaBSxPMYMWHb1DeFFWOzaFUbMrjDWTCbAIDdNKuSGqfXNs8r 7xKIYzYucgESxWuVwUUAPXfqcc8CJjZrPj7MBJaFUbO/HLcAR9ToE9ZQU3gEmswi /sCo8yH4xVk+pE6N3I0Trw5Nmfb5kDdHk678oyBhwd1pXU/aF2n/oGs/p14NrWHr ZwJw2OgTDkDIBMGm12pm6b1l/5VEE0Hp5jQp+QiMPeQI1ek9pEHfAHfOoZVsO7qE lijP3+L/if4= =RA+O -----END PGP SIGNATURE-----