Issued:

2010-05-18

Updated:

2010-05-18

RHSA-2010:0423 - Important: krb5 security update

Synopsis

Important: krb5 security update

Type/Severity

Security Advisory Important

Topic

Updated krb5 packages that fix one security issue are now available for Red Hat Enterprise Linux 3, 4, and 5.

The Red Hat Security Response Team has rated this update as having important security impact. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available from the CVE link in the References section.

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).

A NULL pointer dereference flaw was discovered in the MIT Kerberos Generic Security Service Application Program Interface (GSS-API) library. A remote, authenticated attacker could use this flaw to crash any server application using the GSS-API authentication mechanism, by sending a specially-crafted GSS-API token with a missing checksum field. (CVE-2010-1321)

Red Hat would like to thank the MIT Kerberos Team for responsibly reporting this issue. Upstream acknowledges Shawn Emery of Oracle as the original reporter.

All krb5 users should upgrade to these updated packages, which contain a backported patch to correct this issue. All running services using the MIT Kerberos libraries must be restarted for the update to take effect.

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 This content is not included.http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

Updated Packages

• krb5-libs-1.6.1-36.el5_5.4.ia64.rpm
• krb5-server-1.6.1-36.el5_5.4.s390x.rpm
• krb5-libs-1.3.4-62.el4_8.2.s390.rpm
• krb5-server-1.3.4-62.el4_8.2.ppc.rpm
• krb5-devel-1.3.4-62.el4_8.2.s390.rpm
• krb5-devel-1.3.4-62.el4_8.2.ia64.rpm
• krb5-workstation-1.3.4-62.el4_8.2.ppc.rpm
• krb5-libs-1.3.4-62.el4_8.2.i386.rpm
• krb5-libs-1.6.1-36.el5_5.4.i386.rpm
• krb5-workstation-1.3.4-62.el4_8.2.ia64.rpm
• krb5-libs-1.3.4-62.el4_8.2.ia64.rpm
• krb5-libs-1.6.1-36.el5_5.4.x86_64.rpm
• krb5-devel-1.6.1-36.el5_5.4.ppc64.rpm
• krb5-libs-1.6.1-36.el5_5.4.ppc64.rpm
• krb5-devel-1.6.1-36.el5_5.4.i386.rpm
• krb5-workstation-1.6.1-36.el5_5.4.x86_64.rpm
• krb5-devel-1.3.4-62.el4_8.2.x86_64.rpm
• krb5-libs-1.6.1-36.el5_5.4.ppc.rpm
• krb5-server-1.6.1-36.el5_5.4.x86_64.rpm
• krb5-server-1.3.4-62.el4_8.2.x86_64.rpm
• krb5-libs-1.3.4-62.el4_8.2.x86_64.rpm
• krb5-devel-1.6.1-36.el5_5.4.s390.rpm
• krb5-server-1.3.4-62.el4_8.2.s390x.rpm
• krb5-libs-1.3.4-62.el4_8.2.s390x.rpm
• krb5-server-1.3.4-62.el4_8.2.i386.rpm
• krb5-1.6.1-36.el5_5.4.src.rpm
• krb5-workstation-1.6.1-36.el5_5.4.s390x.rpm
• krb5-devel-1.6.1-36.el5_5.4.ppc.rpm
• krb5-devel-1.3.4-62.el4_8.2.i386.rpm
• krb5-workstation-1.3.4-62.el4_8.2.x86_64.rpm
• krb5-workstation-1.3.4-62.el4_8.2.i386.rpm
• krb5-devel-1.3.4-62.el4_8.2.ppc.rpm
• krb5-workstation-1.6.1-36.el5_5.4.i386.rpm
• krb5-libs-1.6.1-36.el5_5.4.s390.rpm
• krb5-server-1.6.1-36.el5_5.4.i386.rpm
• krb5-devel-1.3.4-62.el4_8.2.s390x.rpm
• krb5-devel-1.6.1-36.el5_5.4.ia64.rpm
• krb5-libs-1.3.4-62.el4_8.2.ppc64.rpm
• krb5-1.3.4-62.el4_8.2.src.rpm
• krb5-libs-1.6.1-36.el5_5.4.s390x.rpm
• krb5-devel-1.6.1-36.el5_5.4.x86_64.rpm
• krb5-workstation-1.6.1-36.el5_5.4.ia64.rpm
• krb5-server-1.3.4-62.el4_8.2.s390.rpm
• krb5-server-1.6.1-36.el5_5.4.ia64.rpm
• krb5-libs-1.3.4-62.el4_8.2.ppc.rpm
• krb5-workstation-1.6.1-36.el5_5.4.ppc.rpm
• krb5-workstation-1.3.4-62.el4_8.2.s390x.rpm
• krb5-workstation-1.3.4-62.el4_8.2.s390.rpm
• krb5-server-1.6.1-36.el5_5.4.ppc.rpm
• krb5-server-1.3.4-62.el4_8.2.ia64.rpm
• krb5-devel-1.6.1-36.el5_5.4.s390x.rpm

Fixes

• This content is not included.BZ - 582466

CVEs

• CVE-2010-1321

References

• http://www.redhat.com/security/updates/classification/#important
• Content from web.mit.edu is not included.Content from web.mit.edu is not included.http://web.mit.edu/Kerberos/advisories/MITKRB5-SA-2010-005.txt

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.