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Red Hat Enterprise MRG: Kernel-RT Important Privilege Escalation Vulnerability RHSA-2014:1998-01

red hat
Calendar Grey December 16, 2014
Dist Redhat Esm H88
Crucial kernel-rt security patch released by Red Hat addressing vulnerabilities linked to privilege escalation, with advisory reference RHSA-2014:1999-02.
Updated kernel-rt packages that fix one security issue are now available for Red Hat Enterprise MRG 2.5

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/articles/11258

To install kernel packages manually, use "rpm -ivh [package]". Do not use "rpm -Uvh" as that will remove the running kernel binaries from your system. You may use "rpm -e" to remove old kernels after determining that the new kernel functions properly on your system.

Summary

The kernel-rt packages contain the Linux kernel, the core of any Linux operating system.
* A flaw was found in the way the Linux kernel handled GS segment register base switching when recovering from a #SS (stack segment) fault on an erroneous return to user space. A local, unprivileged user could use this flaw to escalate their privileges on the system. (CVE-2014-9322, Important)
Red Hat would like to thank Andy Lutomirski for reporting this issue.
Users are advised to upgrade to these updated packages, which upgrade the kernel-rt kernel to version kernel-rt-3.10.58-rt62.60 and correct this issue. The system must be rebooted for this update to take effect.

Topics%20covered

Topics Covered

security advisory security update Red Hat privilege escalation important kernel fix kernel-rt

References

https://access.redhat.com/security/cve/CVE-2014-9322 https://access.redhat.com/security/updates/classification#important

Package List

MRG Realtime for RHEL 6 Server v.2:
Source: kernel-rt-3.10.58-rt62.60.el6rt.src.rpm
noarch: kernel-rt-doc-3.10.58-rt62.60.el6rt.noarch.rpm kernel-rt-firmware-3.10.58-rt62.60.el6rt.noarch.rpm
x86_64: kernel-rt-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-debug-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-debug-debuginfo-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-debug-devel-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-debuginfo-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-debuginfo-common-x86_64-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-devel-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-trace-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-trace-debuginfo-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-trace-devel-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-vanilla-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-vanilla-debuginfo-3.10.58-rt62.60.el6rt.x86_64.rpm kernel-rt-vanilla-devel-3.10.58-rt62.60.el6rt.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-2014:1998-01
Product: Red Hat Enterprise MRG for RHEL-6
Advisory URL: https://access.redhat.com/errata/RHSA-2014:1998.html
Issue date: 2014-12-16

Topic

Updated kernel-rt packages that fix one security issue are now availablefor Red Hat Enterprise MRG 2.5.Red Hat Product Security has rated this update as having Important securityimpact. A Common Vulnerability Scoring System (CVSS) base score, whichgives a detailed severity rating, is available from the CVE link in theReferences section.

Topics%20covered

Topics Covered

security advisory security update Red Hat privilege escalation important kernel fix kernel-rt

Relevant Releases Architectures

MRG Realtime for RHEL 6 Server v.2 - noarch, x86_64

Bugs Fixed

1172806 - CVE-2014-9322 kernel: x86: local privesc due to bad_iret and paranoid entry incompatibility

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