-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ===================================================================== Red Hat Security Advisory Synopsis: Important: kernel-rt security and bug fix update Advisory ID: RHSA-2016:1875-01 Product: Red Hat Enterprise Linux Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-1875.html Issue date: 2016-09-14 CVE Names: CVE-2016-3134 CVE-2016-4997 CVE-2016-4998 ===================================================================== 1. Summary: An update for kernel-rt 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 Realtime (v. 7) - noarch, x86_64 Red Hat Enterprise Linux for Real Time for NFV (v. 7) - noarch, x86_64 3. Description: The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. The kernel-rt packages have been upgraded to the kernel-3.10.0-327.36.1 source tree, which provides a number of bug fixes over the previous version. (BZ#1366538) Security Fix(es): * A security flaw was found in the Linux kernel in the mark_source_chains() function in "net/ipv4/netfilter/ip_tables.c". It is possible for a user-supplied "ipt_entry" structure to have a large "next_offset" field. This field is not bounds checked prior to writing to a counter value at the supplied offset. (CVE-2016-3134, Important) * A flaw was discovered in processing setsockopt for 32 bit processes on 64 bit systems. This flaw will allow attackers to alter arbitrary kernel memory when unloading a kernel module. This action is usually restricted to root-privileged users but can also be leveraged if the kernel is compiled with CONFIG_USER_NS and CONFIG_NET_NS and the user is granted elevated privileges. (CVE-2016-4997, Important) * An out-of-bounds heap memory access leading to a Denial of Service, heap disclosure, or further impact was found in setsockopt(). The function call is normally restricted to root, however some processes with cap_sys_admin may also be able to trigger this flaw in privileged container environments. (CVE-2016-4998, Moderate) 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/): 1317383 - CVE-2016-3134 kernel: netfilter: missing bounds check in ipt_entry structure 1349722 - CVE-2016-4997 kernel: compat IPT_SO_SET_REPLACE setsockopt 1349886 - CVE-2016-4998 kernel: out of bounds reads when processing IPT_SO_SET_REPLACE setsockopt 1366538 - kernel-rt: update to the RHEL7.2.z batch#7 source tree 6. Package List: Red Hat Enterprise Linux for Real Time for NFV (v. 7): Source: kernel-rt-3.10.0-327.36.1.rt56.237.el7.src.rpm noarch: kernel-rt-doc-3.10.0-327.36.1.rt56.237.el7.noarch.rpm x86_64: kernel-rt-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debug-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debug-kvm-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debug-kvm-debuginfo-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-devel-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-kvm-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-kvm-debuginfo-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-trace-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-trace-kvm-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-trace-kvm-debuginfo-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm Red Hat Enterprise Linux Realtime (v. 7): Source: kernel-rt-3.10.0-327.36.1.rt56.237.el7.src.rpm noarch: kernel-rt-doc-3.10.0-327.36.1.rt56.237.el7.noarch.rpm x86_64: kernel-rt-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debug-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debug-debuginfo-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debug-devel-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debuginfo-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-devel-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-trace-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-trace-debuginfo-3.10.0-327.36.1.rt56.237.el7.x86_64.rpm kernel-rt-trace-devel-3.10.0-327.36.1.rt56.237.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-2016-3134 https://access.redhat.com/security/cve/CVE-2016-4997 https://access.redhat.com/security/cve/CVE-2016-4998 https://access.redhat.com/security/updates/classification/#important 8. Contact: The Red Hat security contact is . More contact details at https://access.redhat.com/security/team/contact/ Copyright 2016 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iD8DBQFX2nHYXlSAg2UNWIIRAi9lAJ0ZAItgVyLqEckIpEgKUrgOun4/YgCePodm luwQfjceNxKu1LgXoLR9mMc= =68Az -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce