[RHSA-2012:1150-01] Moderate: kernel-rt security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Moderate: kernel-rt security and bug fix update

Advisory ID: RHSA-2012:1150-01

Product: Red Hat Enterprise MRG for RHEL-6

Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-1150.html

Issue date: 2012-08-08

CVE Names: CVE-2012-2390 CVE-2012-3375

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1. Summary:

 

Updated kernel-rt packages that fix two security issues and two bugs are

now available for Red Hat Enterprise MRG 2.1.

 

The Red Hat Security Response Team has rated this update as having moderate

security impact. Common Vulnerability Scoring System (CVSS) base scores,

which give detailed severity ratings, are available for each vulnerability

from the CVE links in the References section.

 

2. Relevant releases/architectures:

 

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

 

3. Description:

 

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

operating system.

 

This update fixes the following security issues:

 

* A memory leak flaw was found in the way the Linux kernel's memory

subsystem handled resource clean up in the mmap() failure path when the

MAP_HUGETLB flag was set. A local, unprivileged user could use this flaw to

cause a denial of service. (CVE-2012-2390, Moderate)

 

* A flaw was found in the way the Linux kernel's Event Poll (epoll)

subsystem handled resource clean up when an ELOOP error code was returned.

A local, unprivileged user could use this flaw to cause a denial of

service. (CVE-2012-3375, Moderate)

 

This update also fixes the following bugs:

 

* The MRG 2.1 realtime kernel lacked support for automatic memory

reservation for the kdump kernel, as present in Red Hat Enterprise Linux

kernels. Using the parameter crashkernel=auto on the kernel boot command

line led to kdump being disabled because no memory was correctly reserved.

Support for crashkernel=auto has been implemented in the 3.0 realtime

kernel and now when the crashkernel=auto parameter is specified, machines

with more than 4GB of RAM have the amount of memory required by the kdump

kernel calculated and reserved. (BZ#820427)

 

* The current bnx2x driver in the MRG 2.1 realtime kernel had faulty

support for the network adapter PCI ID 14e4:168e and did not work

correctly. The bnx2x driver was updated to include support for this network

adapter. (BZ#839037)

 

Users should upgrade to these updated packages, which upgrade the kernel-rt

kernel to version kernel-rt-3.0.36-rt57, and 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.

 

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/knowledge/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.

 

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

 

824345 - CVE-2012-2390 kernel: huge pages: memory leak on mmap failure

837502 - CVE-2012-3375 kernel: epoll: can leak file descriptors when returning -ELOOP

 

6. Package List:

 

MRG Realtime for RHEL 6 Server v.2:

 

Source:

ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/RHEMRG-RHEL6/SRPMS/kernel-rt-3.0.36-rt57.66.el6rt.src.rpm

 

noarch:

kernel-rt-doc-3.0.36-rt57.66.el6rt.noarch.rpm

kernel-rt-firmware-3.0.36-rt57.66.el6rt.noarch.rpm

 

x86_64:

kernel-rt-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-debug-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-debug-debuginfo-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-debug-devel-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-debuginfo-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-debuginfo-common-x86_64-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-devel-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-trace-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-trace-debuginfo-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-trace-devel-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-vanilla-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-vanilla-debuginfo-3.0.36-rt57.66.el6rt.x86_64.rpm

kernel-rt-vanilla-devel-3.0.36-rt57.66.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/#package

 

7. References:

 

https://www.redhat.com/security/data/cve/CVE-2012-2390.html

https://www.redhat.com/security/data/cve/CVE-2012-3375.html

https://access.redhat.com/security/updates/classification/#moderate

 

8. Contact:

 

The Red Hat security contact is . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2012 Red Hat, Inc.

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