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Red Hat 5.3 RHSA-2010:0711-01 Critical Privilege Escalation Fix

red hat
Calendar Grey September 22, 2010
Dist Redhat Esm H88
Significant Red Hat kernel enhancement targeting a vital privilege escalation vulnerability with essential upgrade recommendations.
Updated kernel packages that fix one security issue are now available for Red Hat Enterprise Linux 5.3 Extended Update Support

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

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 packages contain the Linux kernel, the core of any Linux operating system.
This update fixes the following security issue:
* The compat_alloc_user_space() function in the Linux kernel 32/64-bit compatibility layer implementation was missing sanity checks. This function could be abused in other areas of the Linux kernel if its length argument can be controlled from user-space. On 64-bit systems, a local, unprivileged user could use this flaw to escalate their privileges. (CVE-2010-3081, Important)
Red Hat would like to thank Ben Hawkes for reporting this issue.
Red Hat is aware that a public exploit for this issue is available. Refer to Knowledgebase article DOC-40265 for further details: https://access.redhat.com/kb/docs/DOC-40265
Users should upgrade to these updated packages, which contain a backported patch to correct this issue. The system must be rebooted for this update to take effect.

Topics%20covered

Topics Covered

security advisory Red Hat kernel update privilege escalation security impact important fix extended update

References

https://access.redhat.com/security/cve/CVE-2010-3081 https://access.redhat.com/security/updates/classification#important https://access.redhat.com/kb/docs/DOC-40265

Package List

Red Hat Enterprise Linux (v. 5.3.z server):
Source: kernel-2.6.18-128.23.2.el5.src.rpm
i386: kernel-2.6.18-128.23.2.el5.i686.rpm kernel-PAE-2.6.18-128.23.2.el5.i686.rpm kernel-PAE-debuginfo-2.6.18-128.23.2.el5.i686.rpm kernel-PAE-devel-2.6.18-128.23.2.el5.i686.rpm kernel-debug-2.6.18-128.23.2.el5.i686.rpm kernel-debug-debuginfo-2.6.18-128.23.2.el5.i686.rpm kernel-debug-devel-2.6.18-128.23.2.el5.i686.rpm kernel-debuginfo-2.6.18-128.23.2.el5.i686.rpm kernel-debuginfo-common-2.6.18-128.23.2.el5.i686.rpm kernel-devel-2.6.18-128.23.2.el5.i686.rpm kernel-headers-2.6.18-128.23.2.el5.i386.rpm kernel-xen-2.6.18-128.23.2.el5.i686.rpm kernel-xen-debuginfo-2.6.18-128.23.2.el5.i686.rpm kernel-xen-devel-2.6.18-128.23.2.el5.i686.rpm
ia64: kernel-2.6.18-128.23.2.el5.ia64.rpm kernel-debug-2.6.18-128.23.2.el5.ia64.rpm kernel-debug-debuginfo-2.6.18-128.23.2.el5.ia64.rpm kernel-debug-devel-2.6.18-128.23.2.el5.ia64.rpm kernel-debuginfo-2.6.18-128.23.2.el5.ia64.rpm kernel-debuginfo-common-2.6.18-128.23.2.el5.ia64.rpm kernel-devel-2.6.18-128.23.2.el5.ia64.rpm kernel-headers-2.6.18-128.23.2.el5.ia64.rpm kernel-xen-2.6.18-128.23.2.el5.ia64.rpm kernel-xen-debuginfo-2.6.18-128.23.2.el5.ia64.rpm kernel-xen-devel-2.6.18-128.23.2.el5.ia64.rpm
noarch: kernel-doc-2.6.18-128.23.2.el5.noarch.rpm


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2010:0711-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2010:0711.html
Issue date: 2010-09-22

Topic

Updated kernel packages that fix one security issue are now available forRed Hat Enterprise Linux 5.3 Extended Update Support.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory Red Hat kernel update privilege escalation security impact important fix extended update

Relevant Releases Architectures

Red Hat Enterprise Linux (v. 5.3.z server) - i386, ia64, noarch, ppc, s390x, x86_64

Bugs Fixed

634457 - CVE-2010-3081 kernel: 64-bit Compatibility Mode Stack Pointer Underflow

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