LinuxSecurity.com
Share your story
The central voice for Linux and Open Source security news
Home News Topics Advisories HOWTOs Features Newsletters About Register

Welcome!
Sign up!
EnGarde Community
Login
Polls
What is the most important Linux security technology?
 
Advisories
Community
Linux Events
Linux User Groups
Link to Us
Security Center
Book Reviews
Security Dictionary
Security Tips
SELinux
White Papers
Featured Blogs
All About Linux
DanWalsh LiveJournal
Securitydistro
Latest Newsletters
Linux Security Week: July 28th, 2014
Linux Advisory Watch: July 25th, 2014
Subscribe
LinuxSecurity Newsletters
E-mail:
Choose Lists:
About our Newsletters
RSS Feeds
Get the LinuxSecurity news you want faster with RSS
Powered By

  
RedHat: Important: kernel security and bug fix update Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
RedHat Linux Updated kernel packages that fix two security issues and several bugs are now available for Red Hat Enterprise Linux 5.3 Extended Update Support. This update has been rated as having important security impact by the Red Hat Security Response Team.
=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: kernel security and bug fix update
Advisory ID:       RHSA-2009:1466-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2009-1466.html
Issue date:        2009-09-29
CVE Names:         CVE-2009-2847 CVE-2009-2848 
=====================================================================

1. Summary:

Updated kernel packages that fix two security issues and several bugs are
now available for Red Hat Enterprise Linux 5.3 Extended Update Support.

This update has been rated as having important security impact by the Red
Hat Security Response Team.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5.3.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 includes backported fixes for two security issues. These issues
only affected users of Red Hat Enterprise Linux 5.3 Extended Update Support
as they have already been addressed for users of Red Hat Enterprise Linux 5
in the 5.4 update, RHSA-2009:1243.

In accordance with the support policy, future security updates to Red Hat
Enterprise Linux 5.3 Extended Update Support will only include issues of
critical security impact.

This update fixes the following security issues:

* it was discovered that, when executing a new process, the clear_child_tid
pointer in the Linux kernel is not cleared. If this pointer points to a
writable portion of the memory of the new program, the kernel could corrupt
four bytes of memory, possibly leading to a local denial of service or
privilege escalation. (CVE-2009-2848, Important)

* a flaw was found in the way the do_sigaltstack() function in the Linux
kernel copies the stack_t structure to user-space. On 64-bit machines, this
flaw could lead to a four-byte information leak. (CVE-2009-2847, Moderate)

This update also fixes the following bugs:

* a regression was found in the SCSI retry logic: SCSI mode select was not
retried when retryable errors were encountered. In Device-Mapper Multipath
environments, this could cause paths to fail, or possibly prevent
successful failover. (BZ#506905)

* the gcc flag "-fno-delete-null-pointer-checks" was added to the kernel
build options. This prevents gcc from optimizing out NULL pointer checks
after the first use of a pointer. NULL pointer bugs are often exploited by
attackers, and keeping these checks is considered a safety measure.
(BZ#515468)

* due to incorrect APIC timer calibration, a system hang could have
occurred while booting certain systems. This incorrect timer calibration
could have also caused the system time to become faster or slower. With
this update, it is still possible for APIC timer calibration issues to
occur; however, a clear warning is now provided if they do. (BZ#521237)

* gettimeofday() experienced poor performance (which caused performance
problems for applications using gettimeofday()) when running on hypervisors
that use hardware assisted virtualization. With this update, MFENCE/LFENCE
is used instead of CPUID for gettimeofday() serialization, which resolves
this issue. (BZ#523280)

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The system must be rebooted for this
update to take effect.

4. Solution:

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

This update is available via Red Hat Network.  Details on how to use
the Red Hat Network to apply this update are available at
http://kbase.redhat.com/faq/docs/DOC-11259

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

506905 - LTC 49790: Sync up SCSI DH code with mainline changes [rhel-5.3.z]
515392 - CVE-2009-2847 kernel: information leak in sigaltstack
515423 - CVE-2009-2848 kernel: execve: must clear current->clear_child_tid
515468 - kernel: build with -fno-delete-null-pointer-checks [rhel-5.3.z]
521237 - [RHEL 5] Hang on boot due to wrong APIC timer calibration [rhel-5.3.z]
523280 - RFE: improve gettimeofday performance on hypervisors [rhel-5.3.z]

6. Package List:

Red Hat Enterprise Linux (v. 5.3.z server):

i386:
kernel-2.6.18-128.8.1.el5.i686.rpm
kernel-PAE-2.6.18-128.8.1.el5.i686.rpm
kernel-PAE-debuginfo-2.6.18-128.8.1.el5.i686.rpm
kernel-PAE-devel-2.6.18-128.8.1.el5.i686.rpm
kernel-debug-2.6.18-128.8.1.el5.i686.rpm
kernel-debug-debuginfo-2.6.18-128.8.1.el5.i686.rpm
kernel-debug-devel-2.6.18-128.8.1.el5.i686.rpm
kernel-debuginfo-2.6.18-128.8.1.el5.i686.rpm
kernel-debuginfo-common-2.6.18-128.8.1.el5.i686.rpm
kernel-devel-2.6.18-128.8.1.el5.i686.rpm
kernel-headers-2.6.18-128.8.1.el5.i386.rpm
kernel-xen-2.6.18-128.8.1.el5.i686.rpm
kernel-xen-debuginfo-2.6.18-128.8.1.el5.i686.rpm
kernel-xen-devel-2.6.18-128.8.1.el5.i686.rpm

ia64:
kernel-2.6.18-128.8.1.el5.ia64.rpm
kernel-debug-2.6.18-128.8.1.el5.ia64.rpm
kernel-debug-debuginfo-2.6.18-128.8.1.el5.ia64.rpm
kernel-debug-devel-2.6.18-128.8.1.el5.ia64.rpm
kernel-debuginfo-2.6.18-128.8.1.el5.ia64.rpm
kernel-debuginfo-common-2.6.18-128.8.1.el5.ia64.rpm
kernel-devel-2.6.18-128.8.1.el5.ia64.rpm
kernel-headers-2.6.18-128.8.1.el5.ia64.rpm
kernel-xen-2.6.18-128.8.1.el5.ia64.rpm
kernel-xen-debuginfo-2.6.18-128.8.1.el5.ia64.rpm
kernel-xen-devel-2.6.18-128.8.1.el5.ia64.rpm

noarch:
kernel-doc-2.6.18-128.8.1.el5.noarch.rpm

ppc:
kernel-2.6.18-128.8.1.el5.ppc64.rpm
kernel-debug-2.6.18-128.8.1.el5.ppc64.rpm
kernel-debug-debuginfo-2.6.18-128.8.1.el5.ppc64.rpm
kernel-debug-devel-2.6.18-128.8.1.el5.ppc64.rpm
kernel-debuginfo-2.6.18-128.8.1.el5.ppc64.rpm
kernel-debuginfo-common-2.6.18-128.8.1.el5.ppc64.rpm
kernel-devel-2.6.18-128.8.1.el5.ppc64.rpm
kernel-headers-2.6.18-128.8.1.el5.ppc.rpm
kernel-headers-2.6.18-128.8.1.el5.ppc64.rpm
kernel-kdump-2.6.18-128.8.1.el5.ppc64.rpm
kernel-kdump-debuginfo-2.6.18-128.8.1.el5.ppc64.rpm
kernel-kdump-devel-2.6.18-128.8.1.el5.ppc64.rpm

s390x:
kernel-2.6.18-128.8.1.el5.s390x.rpm
kernel-debug-2.6.18-128.8.1.el5.s390x.rpm
kernel-debug-debuginfo-2.6.18-128.8.1.el5.s390x.rpm
kernel-debug-devel-2.6.18-128.8.1.el5.s390x.rpm
kernel-debuginfo-2.6.18-128.8.1.el5.s390x.rpm
kernel-debuginfo-common-2.6.18-128.8.1.el5.s390x.rpm
kernel-devel-2.6.18-128.8.1.el5.s390x.rpm
kernel-headers-2.6.18-128.8.1.el5.s390x.rpm
kernel-kdump-2.6.18-128.8.1.el5.s390x.rpm
kernel-kdump-debuginfo-2.6.18-128.8.1.el5.s390x.rpm
kernel-kdump-devel-2.6.18-128.8.1.el5.s390x.rpm

x86_64:
kernel-2.6.18-128.8.1.el5.x86_64.rpm
kernel-debug-2.6.18-128.8.1.el5.x86_64.rpm
kernel-debug-debuginfo-2.6.18-128.8.1.el5.x86_64.rpm
kernel-debug-devel-2.6.18-128.8.1.el5.x86_64.rpm
kernel-debuginfo-2.6.18-128.8.1.el5.x86_64.rpm
kernel-debuginfo-common-2.6.18-128.8.1.el5.x86_64.rpm
kernel-devel-2.6.18-128.8.1.el5.x86_64.rpm
kernel-headers-2.6.18-128.8.1.el5.x86_64.rpm
kernel-xen-2.6.18-128.8.1.el5.x86_64.rpm
kernel-xen-debuginfo-2.6.18-128.8.1.el5.x86_64.rpm
kernel-xen-devel-2.6.18-128.8.1.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://www.redhat.com/security/team/key/#package

7. References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2847
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-2848
http://www.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is .  More contact
details at https://www.redhat.com/security/team/contact/

Copyright 2009 Red Hat, Inc.
 
< Prev   Next >
    
Partner

 

Latest Features
Peter Smith Releases Linux Network Security Online
Securing a Linux Web Server
Password guessing with Medusa 2.0
Password guessing as an attack vector
Squid and Digest Authentication
Squid and Basic Authentication
Demystifying the Chinese Hacking Industry: Earning 6 Million a Night
Free Online security course (LearnSIA) - A Call for Help
What You Need to Know About Linux Rootkits
Review: A Practical Guide to Fedora and Red Hat Enterprise Linux - Fifth Edition
Yesterday's Edition
Hackers Plundered Israeli Defense Firms that Built ‘Iron Dome’ Missile Defense System
Internet of things big security worry, says HP
Boffins build FREE SUPERCOMPUTER from free cloud server trials
Insecure Connections: Enterprises hacked after neglecting third-party risks
Partner Sponsor

Community | HOWTOs | Blogs | Features | Book Reviews | Networking
 Security Projects |  Latest News |  Newsletters |  SELinux |  Privacy |  Home
 Hardening |   About Us |   Advertise |   Legal Notice |   RSS |   Guardian Digital
(c)Copyright 2014 Guardian Digital, Inc. All rights reserved.