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: October 20th, 2014
Linux Advisory Watch: October 17th, 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: krb5 security update Print E-mail
User Rating:      How can I rate this item?
Posted by Benjamin D. Thomas   
RedHat Linux Updated krb5 packages that fix various security issues are now available for Red Hat Enterprise Linux 5. This update has been rated as having important security impact by the Red Hat Security Response Team.
=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: krb5 security update
Advisory ID:       RHSA-2009:0408-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2009-0408.html
Issue date:        2009-04-07
CVE Names:         CVE-2009-0844 CVE-2009-0845 CVE-2009-0846 
=====================================================================

1. Summary:

Updated krb5 packages that fix various security issues are now available
for Red Hat Enterprise Linux 5.

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

2. Relevant releases/architectures:

RHEL Desktop Workstation (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

3. Description:

Kerberos is a network authentication system which allows clients and
servers to authenticate to each other using symmetric encryption and a
trusted third party, the Key Distribution Center (KDC). The Generic
Security Service Application Program Interface (GSS-API) definition
provides security services to callers (protocols) in a generic fashion. The
Simple and Protected GSS-API Negotiation (SPNEGO) mechanism is used by
GSS-API peers to choose from a common set of security mechanisms.

An input validation flaw was found in the ASN.1 (Abstract Syntax Notation
One) decoder used by MIT Kerberos. A remote attacker could use this flaw to
crash a network service using the MIT Kerberos library, such as kadmind or
krb5kdc, by causing it to dereference or free an uninitialized pointer.
(CVE-2009-0846)

Multiple input validation flaws were found in the MIT Kerberos GSS-API
library's implementation of the SPNEGO mechanism. A remote attacker could
use these flaws to crash any network service utilizing the MIT Kerberos
GSS-API library to authenticate users or, possibly, leak portions of the
service's memory. (CVE-2009-0844, CVE-2009-0845)

All krb5 users should upgrade to these updated packages, which contain
backported patches to correct these issues. All running services using the
MIT Kerberos libraries must be restarted for the 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/):

490634 - CVE-2009-0845 krb5: NULL pointer dereference in GSSAPI SPNEGO (MITKRB5-SA-2009-001)
491033 - CVE-2009-0844 krb5: buffer over-read in SPNEGO GSS-API mechanism (MITKRB5-SA-2009-001)
491036 - CVE-2009-0846 krb5: ASN.1 decoder can free uninitialized pointer when decoding an invalid encoding (MITKRB5-SA-2009-002)

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/krb5-1.6.1-31.el5_3.3.src.rpm

i386:
krb5-debuginfo-1.6.1-31.el5_3.3.i386.rpm
krb5-libs-1.6.1-31.el5_3.3.i386.rpm
krb5-workstation-1.6.1-31.el5_3.3.i386.rpm

x86_64:
krb5-debuginfo-1.6.1-31.el5_3.3.i386.rpm
krb5-debuginfo-1.6.1-31.el5_3.3.x86_64.rpm
krb5-libs-1.6.1-31.el5_3.3.i386.rpm
krb5-libs-1.6.1-31.el5_3.3.x86_64.rpm
krb5-workstation-1.6.1-31.el5_3.3.x86_64.rpm

RHEL Desktop Workstation (v. 5 client):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/krb5-1.6.1-31.el5_3.3.src.rpm

i386:
krb5-debuginfo-1.6.1-31.el5_3.3.i386.rpm
krb5-devel-1.6.1-31.el5_3.3.i386.rpm
krb5-server-1.6.1-31.el5_3.3.i386.rpm

x86_64:
krb5-debuginfo-1.6.1-31.el5_3.3.i386.rpm
krb5-debuginfo-1.6.1-31.el5_3.3.x86_64.rpm
krb5-devel-1.6.1-31.el5_3.3.i386.rpm
krb5-devel-1.6.1-31.el5_3.3.x86_64.rpm
krb5-server-1.6.1-31.el5_3.3.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/krb5-1.6.1-31.el5_3.3.src.rpm

i386:
krb5-debuginfo-1.6.1-31.el5_3.3.i386.rpm
krb5-devel-1.6.1-31.el5_3.3.i386.rpm
krb5-libs-1.6.1-31.el5_3.3.i386.rpm
krb5-server-1.6.1-31.el5_3.3.i386.rpm
krb5-workstation-1.6.1-31.el5_3.3.i386.rpm

ia64:
krb5-debuginfo-1.6.1-31.el5_3.3.i386.rpm
krb5-debuginfo-1.6.1-31.el5_3.3.ia64.rpm
krb5-devel-1.6.1-31.el5_3.3.ia64.rpm
krb5-libs-1.6.1-31.el5_3.3.i386.rpm
krb5-libs-1.6.1-31.el5_3.3.ia64.rpm
krb5-server-1.6.1-31.el5_3.3.ia64.rpm
krb5-workstation-1.6.1-31.el5_3.3.ia64.rpm

ppc:
krb5-debuginfo-1.6.1-31.el5_3.3.ppc.rpm
krb5-debuginfo-1.6.1-31.el5_3.3.ppc64.rpm
krb5-devel-1.6.1-31.el5_3.3.ppc.rpm
krb5-devel-1.6.1-31.el5_3.3.ppc64.rpm
krb5-libs-1.6.1-31.el5_3.3.ppc.rpm
krb5-libs-1.6.1-31.el5_3.3.ppc64.rpm
krb5-server-1.6.1-31.el5_3.3.ppc.rpm
krb5-workstation-1.6.1-31.el5_3.3.ppc.rpm

s390x:
krb5-debuginfo-1.6.1-31.el5_3.3.s390.rpm
krb5-debuginfo-1.6.1-31.el5_3.3.s390x.rpm
krb5-devel-1.6.1-31.el5_3.3.s390.rpm
krb5-devel-1.6.1-31.el5_3.3.s390x.rpm
krb5-libs-1.6.1-31.el5_3.3.s390.rpm
krb5-libs-1.6.1-31.el5_3.3.s390x.rpm
krb5-server-1.6.1-31.el5_3.3.s390x.rpm
krb5-workstation-1.6.1-31.el5_3.3.s390x.rpm

x86_64:
krb5-debuginfo-1.6.1-31.el5_3.3.i386.rpm
krb5-debuginfo-1.6.1-31.el5_3.3.x86_64.rpm
krb5-devel-1.6.1-31.el5_3.3.i386.rpm
krb5-devel-1.6.1-31.el5_3.3.x86_64.rpm
krb5-libs-1.6.1-31.el5_3.3.i386.rpm
krb5-libs-1.6.1-31.el5_3.3.x86_64.rpm
krb5-server-1.6.1-31.el5_3.3.x86_64.rpm
krb5-workstation-1.6.1-31.el5_3.3.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-2009-0844
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0845
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0846
http://www.redhat.com/security/updates/classification/#important
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-001.txt
http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-002.txt

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
Mobile Device Encryption Could Lead to a ‘Very, Very Dark Place’, FBI Director Says
What a hacker can learn about your life from the coffee shop’s Wi-Fi network
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.