Synopsis:          Important: kernel security and bug fix update

Advisory ID:       SLSA-2015:1137-1

Issue Date:        2015-06-23

CVE Numbers:       CVE-2014-9529

                   CVE-2014-9584

                   CVE-2015-1805

                   CVE-2014-9420

                   CVE-2015-1573

                   CVE-2015-1593

                   CVE-2015-2830

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* It was found that the Linux kernel's implementation of vectored pipe

read and write functionality did not take into account the I/O vectors

that were already processed when retrying after a failed atomic access

operation, potentially resulting in memory corruption due to an I/O vector

array overrun. A local, unprivileged user could use this flaw to crash the

system or, potentially, escalate their privileges on the system.

(CVE-2015-1805, Important)



* A race condition flaw was found in the way the Linux kernel keys

management subsystem performed key garbage collection. A local attacker

could attempt accessing a key while it was being garbage collected, which

would cause the system to crash. (CVE-2014-9529, Moderate)



* A flaw was found in the way the Linux kernel's 32-bit emulation

implementation handled forking or closing of a task with an 'int80' entry.

A local user could potentially use this flaw to escalate their privileges

on the system. (CVE-2015-2830, Low)



* It was found that the Linux kernel's ISO file system implementation did

not correctly limit the traversal of Rock Ridge extension Continuation

Entries (CE). An attacker with physical access to the system could use

this flaw to trigger an infinite loop in the kernel, resulting in a denial

of service. (CVE-2014-9420, Low)



* An information leak flaw was found in the way the Linux kernel's ISO9660

file system implementation accessed data on an ISO9660 image with

RockRidge Extension Reference (ER) records. An attacker with physical

access to the system could use this flaw to disclose up to 255 bytes of

kernel memory. (CVE-2014-9584, Low)



* A flaw was found in the way the nft_flush_table() function of the Linux

kernel's netfilter tables implementation flushed rules that were

referencing deleted chains. A local user who has the CAP_NET_ADMIN

capability could use this flaw to crash the system. (CVE-2015-1573, Low)



* An integer overflow flaw was found in the way the Linux kernel

randomized the stack for processes on certain 64-bit architecture systems,

such as x86-64, causing the stack entropy to be reduced by four.

(CVE-2015-1593, Low)



This update also fixes several bugs. Documentation for these changes is

available from the following Knowledgebase article:



The system must be rebooted for this update to take effect.

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SL7

  x86_64

    kernel-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-debug-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-debug-debuginfo-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-debug-devel-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-debuginfo-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-debuginfo-common-x86_64-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-devel-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-headers-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-tools-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-tools-debuginfo-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-tools-libs-3.10.0-229.7.2.el7.x86_64.rpm

    perf-3.10.0-229.7.2.el7.x86_64.rpm

    perf-debuginfo-3.10.0-229.7.2.el7.x86_64.rpm

    python-perf-debuginfo-3.10.0-229.7.2.el7.x86_64.rpm

    kernel-tools-libs-devel-3.10.0-229.7.2.el7.x86_64.rpm

    python-perf-3.10.0-229.7.2.el7.x86_64.rpm

  noarch

    kernel-abi-whitelists-3.10.0-229.7.2.el7.noarch.rpm

    kernel-doc-3.10.0-229.7.2.el7.noarch.rpm



- Scientific Linux Development Team