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[RHSA-2015:1211-01] Important: kernel security and bug fix update

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Red Hat Security Advisory

 

Synopsis: Important: kernel security and bug fix update

Advisory ID: RHSA-2015:1211-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1211.html

Issue date: 2015-07-07

CVE Names: CVE-2015-1805

=====================================================================

 

1. Summary:

 

Updated kernel packages that fix one security issue and two bugs are now

available for Red Hat Enterprise Linux 6.4 Advanced Update Support.

 

Red Hat Product Security has rated this update as having Important security

impact. A Common Vulnerability Scoring System (CVSS) base score, which

gives a detailed severity rating, is available from the CVE link in the

References section.

 

2. Relevant releases/architectures:

 

Red Hat Enterprise Linux Server AUS (v. 6.4) - i386, noarch, ppc64, s390x, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 6.4) - i386, ppc64, s390x, x86_64

 

3. Description:

 

The kernel packages contain the Linux kernel, the core of any Linux

operating system.

 

* 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)

 

The security impact of this issue was discovered by Red Hat.

 

This update also fixes the following bugs:

 

* The backlog data could previously not be consumed when the

audit_log_start() function was running even if audit_log_start() called the

wait_for_auditd() function to consume it. As only auditd could consume the

backlog data, audit_log_start() terminated unexpectedly. Consequently, the

system became unresponsive until the backlog timeout was up. With this

update, audit_log_start() no longer terminates and the system shuts down

and reboots gracefully in a timely manner. (BZ#1140489)

 

* Direct I/O writes extending a parallel file could previously race to

update the size of the file. If the writes executed in the out-of-order

manner, the file size could move backwards and push a previously completed

write beyond EOF, causing it to be lost. With this update, file size

updates are always executed in appropriate order, thus fixing this bug.

(BZ#1218497)

 

All kernel users are advised to upgrade to these updated packages, which

contain backported patches to correct these issues. 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.

 

For details on how to apply this update, refer to:

 

https://access.redhat.com/articles/11258

 

5. Bugs fixed (https://bugzilla.redhat.com/):

 

1202855 - CVE-2015-1805 kernel: pipe: iovec overrun leading to memory corruption

 

6. Package List:

 

Red Hat Enterprise Linux Server AUS (v. 6.4):

 

Source:

kernel-2.6.32-358.62.1.el6.src.rpm

 

i386:

kernel-2.6.32-358.62.1.el6.i686.rpm

kernel-debug-2.6.32-358.62.1.el6.i686.rpm

kernel-debug-debuginfo-2.6.32-358.62.1.el6.i686.rpm

kernel-debug-devel-2.6.32-358.62.1.el6.i686.rpm

kernel-debuginfo-2.6.32-358.62.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-358.62.1.el6.i686.rpm

kernel-devel-2.6.32-358.62.1.el6.i686.rpm

kernel-headers-2.6.32-358.62.1.el6.i686.rpm

perf-2.6.32-358.62.1.el6.i686.rpm

perf-debuginfo-2.6.32-358.62.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-358.62.1.el6.i686.rpm

 

noarch:

kernel-doc-2.6.32-358.62.1.el6.noarch.rpm

kernel-firmware-2.6.32-358.62.1.el6.noarch.rpm

 

ppc64:

kernel-2.6.32-358.62.1.el6.ppc64.rpm

kernel-bootwrapper-2.6.32-358.62.1.el6.ppc64.rpm

kernel-debug-2.6.32-358.62.1.el6.ppc64.rpm

kernel-debug-debuginfo-2.6.32-358.62.1.el6.ppc64.rpm

kernel-debug-devel-2.6.32-358.62.1.el6.ppc64.rpm

kernel-debuginfo-2.6.32-358.62.1.el6.ppc64.rpm

kernel-debuginfo-common-ppc64-2.6.32-358.62.1.el6.ppc64.rpm

kernel-devel-2.6.32-358.62.1.el6.ppc64.rpm

kernel-headers-2.6.32-358.62.1.el6.ppc64.rpm

perf-2.6.32-358.62.1.el6.ppc64.rpm

perf-debuginfo-2.6.32-358.62.1.el6.ppc64.rpm

python-perf-debuginfo-2.6.32-358.62.1.el6.ppc64.rpm

 

s390x:

kernel-2.6.32-358.62.1.el6.s390x.rpm

kernel-debug-2.6.32-358.62.1.el6.s390x.rpm

kernel-debug-debuginfo-2.6.32-358.62.1.el6.s390x.rpm

kernel-debug-devel-2.6.32-358.62.1.el6.s390x.rpm

kernel-debuginfo-2.6.32-358.62.1.el6.s390x.rpm

kernel-debuginfo-common-s390x-2.6.32-358.62.1.el6.s390x.rpm

kernel-devel-2.6.32-358.62.1.el6.s390x.rpm

kernel-headers-2.6.32-358.62.1.el6.s390x.rpm

kernel-kdump-2.6.32-358.62.1.el6.s390x.rpm

kernel-kdump-debuginfo-2.6.32-358.62.1.el6.s390x.rpm

kernel-kdump-devel-2.6.32-358.62.1.el6.s390x.rpm

perf-2.6.32-358.62.1.el6.s390x.rpm

perf-debuginfo-2.6.32-358.62.1.el6.s390x.rpm

python-perf-debuginfo-2.6.32-358.62.1.el6.s390x.rpm

 

x86_64:

kernel-2.6.32-358.62.1.el6.x86_64.rpm

kernel-debug-2.6.32-358.62.1.el6.x86_64.rpm

kernel-debug-debuginfo-2.6.32-358.62.1.el6.x86_64.rpm

kernel-debug-devel-2.6.32-358.62.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-358.62.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-358.62.1.el6.x86_64.rpm

kernel-devel-2.6.32-358.62.1.el6.x86_64.rpm

kernel-headers-2.6.32-358.62.1.el6.x86_64.rpm

perf-2.6.32-358.62.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-358.62.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-358.62.1.el6.x86_64.rpm

 

Red Hat Enterprise Linux Server Optional AUS (v. 6.4):

 

Source:

kernel-2.6.32-358.62.1.el6.src.rpm

 

i386:

kernel-debug-debuginfo-2.6.32-358.62.1.el6.i686.rpm

kernel-debuginfo-2.6.32-358.62.1.el6.i686.rpm

kernel-debuginfo-common-i686-2.6.32-358.62.1.el6.i686.rpm

perf-debuginfo-2.6.32-358.62.1.el6.i686.rpm

python-perf-2.6.32-358.62.1.el6.i686.rpm

python-perf-debuginfo-2.6.32-358.62.1.el6.i686.rpm

 

ppc64:

kernel-debug-debuginfo-2.6.32-358.62.1.el6.ppc64.rpm

kernel-debuginfo-2.6.32-358.62.1.el6.ppc64.rpm

kernel-debuginfo-common-ppc64-2.6.32-358.62.1.el6.ppc64.rpm

perf-debuginfo-2.6.32-358.62.1.el6.ppc64.rpm

python-perf-2.6.32-358.62.1.el6.ppc64.rpm

python-perf-debuginfo-2.6.32-358.62.1.el6.ppc64.rpm

 

s390x:

kernel-debug-debuginfo-2.6.32-358.62.1.el6.s390x.rpm

kernel-debuginfo-2.6.32-358.62.1.el6.s390x.rpm

kernel-debuginfo-common-s390x-2.6.32-358.62.1.el6.s390x.rpm

kernel-kdump-debuginfo-2.6.32-358.62.1.el6.s390x.rpm

perf-debuginfo-2.6.32-358.62.1.el6.s390x.rpm

python-perf-2.6.32-358.62.1.el6.s390x.rpm

python-perf-debuginfo-2.6.32-358.62.1.el6.s390x.rpm

 

x86_64:

kernel-debug-debuginfo-2.6.32-358.62.1.el6.x86_64.rpm

kernel-debuginfo-2.6.32-358.62.1.el6.x86_64.rpm

kernel-debuginfo-common-x86_64-2.6.32-358.62.1.el6.x86_64.rpm

perf-debuginfo-2.6.32-358.62.1.el6.x86_64.rpm

python-perf-2.6.32-358.62.1.el6.x86_64.rpm

python-perf-debuginfo-2.6.32-358.62.1.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-2015-1805

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 2015 Red Hat, Inc.

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