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Red Hat: RHSA-2015:1082-01 Critical: Kernel Security Update

red hat
Calendar Grey June 9, 2015
Dist Redhat Esm H88
Critical system patch released by Red Hat addressing two major vulnerabilities for corporate clients.
Updated kernel packages that fix two security issues are now available for Red Hat Enterprise Linux 6.2 Advanced Update Support

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

Summary

The kernel packages contain the Linux kernel, the core of any Linux operating system.
* A use-after-free flaw was found in the way the Linux kernel's SCTP implementation handled authentication key reference counting during INIT collisions. A remote attacker could use this flaw to crash the system or, potentially, escalate their privileges on the system. (CVE-2015-1421, Important)
* 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 CVE-2015-1421 issue was discovered by Sun Baoliang of Red Hat, and the security impact of the CVE-2015-1805 issue was discovered by Red Hat.
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.

Topics%20covered

Topics Covered

security advisory kernel update remote attack Red Hat Enterprise Linux system crash

References

https://access.redhat.com/security/cve/CVE-2015-1421 https://access.redhat.com/security/cve/CVE-2015-1805 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux AUS (v. 6.2 server):
Source: kernel-2.6.32-220.63.2.el6.src.rpm
noarch: kernel-doc-2.6.32-220.63.2.el6.noarch.rpm kernel-firmware-2.6.32-220.63.2.el6.noarch.rpm
x86_64: kernel-2.6.32-220.63.2.el6.x86_64.rpm kernel-debug-2.6.32-220.63.2.el6.x86_64.rpm kernel-debug-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm kernel-debug-devel-2.6.32-220.63.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-220.63.2.el6.x86_64.rpm kernel-devel-2.6.32-220.63.2.el6.x86_64.rpm kernel-headers-2.6.32-220.63.2.el6.x86_64.rpm perf-2.6.32-220.63.2.el6.x86_64.rpm perf-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm
Red Hat Enterprise Linux Server Optional AUS (v. 6.2):
Source: kernel-2.6.32-220.63.2.el6.src.rpm
x86_64: kernel-debug-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm kernel-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm kernel-debuginfo-common-x86_64-2.6.32-220.63.2.el6.x86_64.rpm perf-debuginfo-2.6.32-220.63.2.el6.x86_64.rpm python-perf-2.6.32-220.63.2.el6.x86_64.rpm python-perf-debuginfo-2.6.32-220.63.2.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/


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2015:1082-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:1082.html
Issue date: 2015-06-09

Topic

Updated kernel packages that fix two security issues are now available forRed Hat Enterprise Linux 6.2 Advanced Update Support.Red Hat Product Security has rated this update as having Important securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.

Topics%20covered

Topics Covered

security advisory kernel update remote attack Red Hat Enterprise Linux system crash

Relevant Releases Architectures

Red Hat Enterprise Linux AUS (v. 6.2 server) - noarch, x86_64

Red Hat Enterprise Linux Server Optional AUS (v. 6.2) - x86_64

Bugs Fixed

1196581 - CVE-2015-1421 kernel: net: slab corruption from use after free on INIT collisions

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

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