-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: kernel security and bug fix update Advisory ID: RHSA-2018:2925-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2018:2925 Issue date: 2018-10-16 CVE Names: CVE-2018-5391 CVE-2018-10675 CVE-2018-14634 ==================================================================== 1. Summary: An update for kernel is now available for Red Hat Enterprise Linux 6.7 Extended Update Support. 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 HPC Node EUS (v. 6.7) - noarch, x86_64 Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7) - x86_64 Red Hat Enterprise Linux Server EUS (v. 6.7) - i386, noarch, ppc64, s390x, x86_64 Red Hat Enterprise Linux Server Optional EUS (v. 6.7) - i386, ppc64, s390x, x86_64 3. Description: The kernel packages contain the Linux kernel, the core of any Linux operating system. Security Fix(es): * A flaw named FragmentSmack was found in the way the Linux kernel handled reassembly of fragmented IPv4 and IPv6 packets. A remote attacker could use this flaw to trigger time and calculation expensive fragment reassembly algorithm by sending specially crafted packets which could lead to a CPU saturation and hence a denial of service on the system. (CVE-2018-5391) * kernel: mm: use-after-free in do_get_mempolicy function allows local DoS or other unspecified impact (CVE-2018-10675) * kernel: Integer overflow in Linux's create_elf_tables function (CVE-2018-14634) For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section. Red Hat would like to thank Juha-Matti Tilli (Aalto University - Department of Communications and Networking and Nokia Bell Labs) for reporting CVE-2018-5391 and Qualys Research Labs for reporting CVE-2018-14634. Bug Fix(es): * Previously, the kernel source code lacked support to report the Speculative Store Bypass Disable (SSBD) vulnerability status on IBM Power Systems. As a consequence, the /sys/devices/system/cpu/vulnerabilities/spec_store_bypass file incorrectly reported "Not affected". This fix updates the kernel source code to properly report the SSBD status either as "Vulnerable" or "Mitigation: Kernel entry/exit barrier (TYPE)", where TYPE is one of "eieio", "hwsync", "fallback", or "unknown". (BZ#1615873) * After updating the system to prevent the L1 Terminal Fault (L1TF) vulnerability, only one thread was detected on systems that offer processing of two threads on a single processor core. With this update, the "__max_smt_threads()" function has been fixed. As a result, both threads are now detected correctly in the described situation. (BZ#1625335) * Previously, a kernel panic occurred when the kernel tried to make an out of bound access to the array that describes the L1 Terminal Fault (L1TF) mitigation state on systems without Extended Page Tables (EPT) support. This update extends the array of mitigation states to cover all the states, which effectively prevents out of bound array access. Also, this update enables rejecting invalid, irrelevant values, that might be erroneously provided by the userspace. As a result, the kernel no longer panics in the described scenario. (BZ#1629634) 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/): 1575065 - CVE-2018-10675 kernel: mm: use-after-free in do_get_mempolicy function allows local DoS or other unspecified impact 1609664 - CVE-2018-5391 kernel: IP fragments with random offsets allow a remote denial of service (FragmentSmack) 1624498 - CVE-2018-14634 kernel: Integer overflow in Linux's create_elf_tables function 6. Package List: Red Hat Enterprise Linux HPC Node EUS (v. 6.7): Source: kernel-2.6.32-573.65.2.el6.src.rpm noarch: kernel-abi-whitelists-2.6.32-573.65.2.el6.noarch.rpm kernel-doc-2.6.32-573.65.2.el6.noarch.rpm kernel-firmware-2.6.32-573.65.2.el6.noarch.rpm x86_64: kernel-2.6.32-573.65.2.el6.x86_64.rpm kernel-debug-2.6.32-573.65.2.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-573.65.2.el6.i686.rpm kernel-debug-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm kernel-debug-devel-2.6.32-573.65.2.el6.i686.rpm kernel-debug-devel-2.6.32-573.65.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.65.2.el6.i686.rpm kernel-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-573.65.2.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-573.65.2.el6.x86_64.rpm kernel-devel-2.6.32-573.65.2.el6.x86_64.rpm kernel-headers-2.6.32-573.65.2.el6.x86_64.rpm perf-2.6.32-573.65.2.el6.x86_64.rpm perf-debuginfo-2.6.32-573.65.2.el6.i686.rpm perf-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.i686.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm Red Hat Enterprise Linux HPC Node Optional EUS (v. 6.7): x86_64: kernel-debug-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-573.65.2.el6.x86_64.rpm perf-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm python-perf-2.6.32-573.65.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm Red Hat Enterprise Linux Server EUS (v. 6.7): Source: kernel-2.6.32-573.65.2.el6.src.rpm i386: kernel-2.6.32-573.65.2.el6.i686.rpm kernel-debug-2.6.32-573.65.2.el6.i686.rpm kernel-debug-debuginfo-2.6.32-573.65.2.el6.i686.rpm kernel-debug-devel-2.6.32-573.65.2.el6.i686.rpm kernel-debuginfo-2.6.32-573.65.2.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-573.65.2.el6.i686.rpm kernel-devel-2.6.32-573.65.2.el6.i686.rpm kernel-headers-2.6.32-573.65.2.el6.i686.rpm perf-2.6.32-573.65.2.el6.i686.rpm perf-debuginfo-2.6.32-573.65.2.el6.i686.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.i686.rpm noarch: kernel-abi-whitelists-2.6.32-573.65.2.el6.noarch.rpm kernel-doc-2.6.32-573.65.2.el6.noarch.rpm kernel-firmware-2.6.32-573.65.2.el6.noarch.rpm ppc64: kernel-2.6.32-573.65.2.el6.ppc64.rpm kernel-bootwrapper-2.6.32-573.65.2.el6.ppc64.rpm kernel-debug-2.6.32-573.65.2.el6.ppc64.rpm kernel-debug-debuginfo-2.6.32-573.65.2.el6.ppc64.rpm kernel-debug-devel-2.6.32-573.65.2.el6.ppc64.rpm kernel-debuginfo-2.6.32-573.65.2.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-573.65.2.el6.ppc64.rpm kernel-devel-2.6.32-573.65.2.el6.ppc64.rpm kernel-headers-2.6.32-573.65.2.el6.ppc64.rpm perf-2.6.32-573.65.2.el6.ppc64.rpm perf-debuginfo-2.6.32-573.65.2.el6.ppc64.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.ppc64.rpm s390x: kernel-2.6.32-573.65.2.el6.s390x.rpm kernel-debug-2.6.32-573.65.2.el6.s390x.rpm kernel-debug-debuginfo-2.6.32-573.65.2.el6.s390x.rpm kernel-debug-devel-2.6.32-573.65.2.el6.s390x.rpm kernel-debuginfo-2.6.32-573.65.2.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-573.65.2.el6.s390x.rpm kernel-devel-2.6.32-573.65.2.el6.s390x.rpm kernel-headers-2.6.32-573.65.2.el6.s390x.rpm kernel-kdump-2.6.32-573.65.2.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-573.65.2.el6.s390x.rpm kernel-kdump-devel-2.6.32-573.65.2.el6.s390x.rpm perf-2.6.32-573.65.2.el6.s390x.rpm perf-debuginfo-2.6.32-573.65.2.el6.s390x.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.s390x.rpm x86_64: kernel-2.6.32-573.65.2.el6.x86_64.rpm kernel-debug-2.6.32-573.65.2.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-573.65.2.el6.i686.rpm kernel-debug-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm kernel-debug-devel-2.6.32-573.65.2.el6.i686.rpm kernel-debug-devel-2.6.32-573.65.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.65.2.el6.i686.rpm kernel-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm kernel-debuginfo-common-i686-2.6.32-573.65.2.el6.i686.rpm kernel-debuginfo-common-x86_64-2.6.32-573.65.2.el6.x86_64.rpm kernel-devel-2.6.32-573.65.2.el6.x86_64.rpm kernel-headers-2.6.32-573.65.2.el6.x86_64.rpm perf-2.6.32-573.65.2.el6.x86_64.rpm perf-debuginfo-2.6.32-573.65.2.el6.i686.rpm perf-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.i686.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm Red Hat Enterprise Linux Server Optional EUS (v. 6.7): i386: kernel-debug-debuginfo-2.6.32-573.65.2.el6.i686.rpm kernel-debuginfo-2.6.32-573.65.2.el6.i686.rpm kernel-debuginfo-common-i686-2.6.32-573.65.2.el6.i686.rpm perf-debuginfo-2.6.32-573.65.2.el6.i686.rpm python-perf-2.6.32-573.65.2.el6.i686.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.i686.rpm ppc64: kernel-debug-debuginfo-2.6.32-573.65.2.el6.ppc64.rpm kernel-debuginfo-2.6.32-573.65.2.el6.ppc64.rpm kernel-debuginfo-common-ppc64-2.6.32-573.65.2.el6.ppc64.rpm perf-debuginfo-2.6.32-573.65.2.el6.ppc64.rpm python-perf-2.6.32-573.65.2.el6.ppc64.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.ppc64.rpm s390x: kernel-debug-debuginfo-2.6.32-573.65.2.el6.s390x.rpm kernel-debuginfo-2.6.32-573.65.2.el6.s390x.rpm kernel-debuginfo-common-s390x-2.6.32-573.65.2.el6.s390x.rpm kernel-kdump-debuginfo-2.6.32-573.65.2.el6.s390x.rpm perf-debuginfo-2.6.32-573.65.2.el6.s390x.rpm python-perf-2.6.32-573.65.2.el6.s390x.rpm python-perf-debuginfo-2.6.32-573.65.2.el6.s390x.rpm x86_64: kernel-debug-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-573.65.2.el6.x86_64.rpm perf-debuginfo-2.6.32-573.65.2.el6.x86_64.rpm python-perf-2.6.32-573.65.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-573.65.2.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/ 7. References: https://access.redhat.com/security/cve/CVE-2018-5391 https://access.redhat.com/security/cve/CVE-2018-10675 https://access.redhat.com/security/cve/CVE-2018-14634 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/articles/3553061 https://access.redhat.com/security/vulnerabilities/mutagen-astronomy 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2018 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBW8Z6itzjgjWX9erEAQihmg/+ONhYRMfXI8p2Ej4My0OG2tlpgkFtWNaV 6mO9pCv/pNf93U7/F1Dp2SHMdTfTk4lvhI86dYGohvRTD0jqeLfi6zxBtPcD61wO gn1jLlTdN8a7/zbT3QxD6fnqBqsu7uftoV48PRwvf18NoiSBHkmTCAFqNO/J/etW Tsm8Wii+vdg727QDrWvfmYL4iIPIynrEvfTpFzksxyK/wqCaBduxp6LgLVGEQPkH 68zy7uXbzyNFvlOjmAdql/T5jWrJ9l4sfCkioPGYV0/2+6v+RT82plYJYAYNQc+f Zf7nlLaGI2Gxh207R0JpTdyLR7IM5mThLXm2Xjf0rm3XkYQN6/vEyG44RJWb1eEY yBRvY7Cm2G3+F2+pV5POLTjpzUr3kGjD5YkTTiYjby0i38/o8UWSwH+QJGkMv+wL tMOMH9AsQkE3srG0TQEVoyBYOcnYb5YFv/oy//uOHqX2E1DksVgV9CskQgOhyHuE X3pEdCAv6ai/r3nJxhoQuIj1kgUrBYa5zXkC/MDCUz4lhSOWNcjQXksRL3T4JQz/ rA44XSBvX5EB5YVtcLhYmMYBc+LBcTcJgR3iQtXgkiAnfEWAu6GznXQGjZANmrE+ oxbaxYtidRGbkhVayFUju44heYE3+Hh0hw3BoXICXkihE1BNI0WiBcBmzmsSNuUR ed0pFxszsPc=dvOf -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce