[RHSA-2011:1419-01] Moderate: kernel security and bug fix update

[news 28]

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Red Hat Security Advisory

 

Synopsis: Moderate: kernel security and bug fix update

Advisory ID: RHSA-2011:1419-01

Product: Red Hat Enterprise Linux

Advisory URL: https://rhn.redhat.com/errata/RHSA-2011-1419.html

Issue date: 2011-11-01

CVE Names: CVE-2011-3188 CVE-2011-3209

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

 

1. Summary:

 

Updated kernel packages that fix two security issues and four bugs are now

available for Red Hat Enterprise Linux 5.6 Extended Update Support.

 

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:

 

Red Hat Enterprise Linux (v. 5.6.z server) - i386, ia64, noarch, ppc, s390x, x86_64

 

3. Description:

 

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

operating system.

 

This update fixes the following security issues:

 

* The way IPv4 and IPv6 protocol sequence numbers and fragment IDs were

generated could allow a man-in-the-middle attacker to inject packets and

possibly hijack connections. Protocol sequence numbers and fragment IDs are

now more random. (CVE-2011-3188, Moderate)

 

* A flaw was found in the Linux kernel's clock implementation on 32-bit,

SMP (symmetric multiprocessing) systems. A local, unprivileged user could

use this flaw to cause a divide error fault, resulting in a denial of

service. (CVE-2011-3209, Moderate)

 

Red Hat would like to thank Dan Kaminsky for reporting CVE-2011-3188, and

Yasuaki Ishimatsu for reporting CVE-2011-3209.

 

In addition, this update fixes the following bugs:

 

* When the Global File System 2 (GFS2) file system is suspended, its delete

work queue is also suspended, along with any pending work on the queue.

Prior to this update, if GFS2's transaction lock was demoted while the

delete work queue was suspended, a deadlock could occur on the file system

because the file system tried to flush the work queue in the lock demotion

code. With this update, the delete work queue is no longer flushed by the

lock demotion code, and a deadlock no longer occurs. Instead, the work

queue is flushed by the unmount operation, so that pending work is properly

completed. (BZ#733678)

 

* A previously applied patch introduced a regression for third-party file

systems that do not set the FS_HAS_IODONE2 flag, specifically, Oracle

Cluster File System 2 (OCFS2). The patch removed a call to the aio_complete

function, resulting in no completion events being processed, causing

user-space applications to become unresponsive. This update reintroduces

the aio_complete function call, fixing this issue. (BZ#734156)

 

* Certain devices support multiple operation modes. For example, EMC

CLARiiON disk arrays support ALUA mode and their own vendor specific mode

for failover. In Red Hat Enterprise Linux 5.5, a bug was discovered that

prevented tools such as multipath from being able to select the

device/hardware handler plug-in to use. This resulted in the application

(for example, multipath) not working properly. With this update, the kernel

has been modified to allow applications to select the device/hardware

handler to use, thus resolving this issue. (BZ#739900)

 

* This update improves the performance of delete/unlink operations in a

GFS2 file system with large files by adding a layer of metadata read-ahead

for indirect blocks. (BZ#743805)

 

Users should upgrade to these updated packages, which contain backported

patches to resolve 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/kb/docs/DOC-11259

 

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/):

 

732658 - CVE-2011-3188 kernel: net: improve sequence number generation

732878 - CVE-2011-3209 kernel: panic occurs when clock_gettime() is called

733678 - GFS2: recovery stuck on transaction lock [rhel-5.6.z]

739900 - scsi_dh_emc gives "error attaching hardware handler" for EMC active-active SANs [rhel-5.6.z]

 

6. Package List:

 

Red Hat Enterprise Linux (v. 5.6.z server):

 

Source:

kernel-2.6.18-238.28.1.el5.src.rpm

 

i386:

kernel-2.6.18-238.28.1.el5.i686.rpm

kernel-PAE-2.6.18-238.28.1.el5.i686.rpm

kernel-PAE-debuginfo-2.6.18-238.28.1.el5.i686.rpm

kernel-PAE-devel-2.6.18-238.28.1.el5.i686.rpm

kernel-debug-2.6.18-238.28.1.el5.i686.rpm

kernel-debug-debuginfo-2.6.18-238.28.1.el5.i686.rpm

kernel-debug-devel-2.6.18-238.28.1.el5.i686.rpm

kernel-debuginfo-2.6.18-238.28.1.el5.i686.rpm

kernel-debuginfo-common-2.6.18-238.28.1.el5.i686.rpm

kernel-devel-2.6.18-238.28.1.el5.i686.rpm

kernel-headers-2.6.18-238.28.1.el5.i386.rpm

kernel-xen-2.6.18-238.28.1.el5.i686.rpm

kernel-xen-debuginfo-2.6.18-238.28.1.el5.i686.rpm

kernel-xen-devel-2.6.18-238.28.1.el5.i686.rpm

 

ia64:

kernel-2.6.18-238.28.1.el5.ia64.rpm

kernel-debug-2.6.18-238.28.1.el5.ia64.rpm

kernel-debug-debuginfo-2.6.18-238.28.1.el5.ia64.rpm

kernel-debug-devel-2.6.18-238.28.1.el5.ia64.rpm

kernel-debuginfo-2.6.18-238.28.1.el5.ia64.rpm

kernel-debuginfo-common-2.6.18-238.28.1.el5.ia64.rpm

kernel-devel-2.6.18-238.28.1.el5.ia64.rpm

kernel-headers-2.6.18-238.28.1.el5.ia64.rpm

kernel-xen-2.6.18-238.28.1.el5.ia64.rpm

kernel-xen-debuginfo-2.6.18-238.28.1.el5.ia64.rpm

kernel-xen-devel-2.6.18-238.28.1.el5.ia64.rpm

 

noarch:

kernel-doc-2.6.18-238.28.1.el5.noarch.rpm

 

ppc:

kernel-2.6.18-238.28.1.el5.ppc64.rpm

kernel-debug-2.6.18-238.28.1.el5.ppc64.rpm

kernel-debug-debuginfo-2.6.18-238.28.1.el5.ppc64.rpm

kernel-debug-devel-2.6.18-238.28.1.el5.ppc64.rpm

kernel-debuginfo-2.6.18-238.28.1.el5.ppc64.rpm

kernel-debuginfo-common-2.6.18-238.28.1.el5.ppc64.rpm

kernel-devel-2.6.18-238.28.1.el5.ppc64.rpm

kernel-headers-2.6.18-238.28.1.el5.ppc.rpm

kernel-headers-2.6.18-238.28.1.el5.ppc64.rpm

kernel-kdump-2.6.18-238.28.1.el5.ppc64.rpm

kernel-kdump-debuginfo-2.6.18-238.28.1.el5.ppc64.rpm

kernel-kdump-devel-2.6.18-238.28.1.el5.ppc64.rpm

 

s390x:

kernel-2.6.18-238.28.1.el5.s390x.rpm

kernel-debug-2.6.18-238.28.1.el5.s390x.rpm

kernel-debug-debuginfo-2.6.18-238.28.1.el5.s390x.rpm

kernel-debug-devel-2.6.18-238.28.1.el5.s390x.rpm

kernel-debuginfo-2.6.18-238.28.1.el5.s390x.rpm

kernel-debuginfo-common-2.6.18-238.28.1.el5.s390x.rpm

kernel-devel-2.6.18-238.28.1.el5.s390x.rpm

kernel-headers-2.6.18-238.28.1.el5.s390x.rpm

kernel-kdump-2.6.18-238.28.1.el5.s390x.rpm

kernel-kdump-debuginfo-2.6.18-238.28.1.el5.s390x.rpm

kernel-kdump-devel-2.6.18-238.28.1.el5.s390x.rpm

 

x86_64:

kernel-2.6.18-238.28.1.el5.x86_64.rpm

kernel-debug-2.6.18-238.28.1.el5.x86_64.rpm

kernel-debug-debuginfo-2.6.18-238.28.1.el5.x86_64.rpm

kernel-debug-devel-2.6.18-238.28.1.el5.x86_64.rpm

kernel-debuginfo-2.6.18-238.28.1.el5.x86_64.rpm

kernel-debuginfo-common-2.6.18-238.28.1.el5.x86_64.rpm

kernel-devel-2.6.18-238.28.1.el5.x86_64.rpm

kernel-headers-2.6.18-238.28.1.el5.x86_64.rpm

kernel-xen-2.6.18-238.28.1.el5.x86_64.rpm

kernel-xen-debuginfo-2.6.18-238.28.1.el5.x86_64.rpm

kernel-xen-devel-2.6.18-238.28.1.el5.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-2011-3188.html

https://www.redhat.com/security/data/cve/CVE-2011-3209.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 2011 Red Hat, Inc.

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