Issued:

2010-01-12

Updated:

2010-01-12

RHSA-2010:0029 - Critical: krb5 security update

Synopsis

Critical: krb5 security update

Type/Severity

Security Advisory Critical

Topic

Updated krb5 packages that fix multiple security issues are now available for Red Hat Enterprise Linux 3, 4, and 5, and Red Hat Enterprise Linux 4.7, 5.2, and 5.3 Extended Update Support.

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

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).

Multiple integer underflow flaws, leading to heap-based corruption, were found in the way the MIT Kerberos Key Distribution Center (KDC) decrypted ciphertexts encrypted with the Advanced Encryption Standard (AES) and ARCFOUR (RC4) encryption algorithms. If a remote KDC client were able to provide a specially-crafted AES- or RC4-encrypted ciphertext or texts, it could potentially lead to either a denial of service of the central KDC (KDC crash or abort upon processing the crafted ciphertext), or arbitrary code execution with the privileges of the KDC (i.e., root privileges). (CVE-2009-4212)

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

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

Affected Products

Updated Packages

• krb5-libs-1.6.1-36.el5_4.1.ppc.rpm
• krb5-server-1.3.4-60.el4_7.3.x86_64.rpm
• krb5-workstation-1.3.4-62.el4_8.1.x86_64.rpm
• krb5-workstation-1.3.4-60.el4_7.3.s390x.rpm
• krb5-1.6.1-36.el5_4.1.src.rpm
• krb5-server-1.3.4-62.el4_8.1.i386.rpm
• krb5-server-1.6.1-36.el5_4.1.ia64.rpm
• krb5-workstation-1.3.4-62.el4_8.1.s390.rpm
• krb5-libs-1.3.4-62.el4_8.1.s390.rpm
• krb5-devel-1.6.1-36.el5_4.1.ppc64.rpm
• krb5-workstation-1.6.1-36.el5_4.1.ia64.rpm
• krb5-libs-1.3.4-62.el4_8.1.ia64.rpm
• krb5-workstation-1.3.4-62.el4_8.1.ia64.rpm
• krb5-devel-1.3.4-60.el4_7.3.ppc.rpm
• krb5-server-1.3.4-62.el4_8.1.s390.rpm
• krb5-workstation-1.3.4-60.el4_7.3.x86_64.rpm
• krb5-workstation-1.6.1-36.el5_4.1.i386.rpm
• krb5-devel-1.3.4-60.el4_7.3.i386.rpm
• krb5-workstation-1.3.4-60.el4_7.3.ia64.rpm
• krb5-devel-1.3.4-62.el4_8.1.x86_64.rpm
• krb5-libs-1.3.4-62.el4_8.1.ppc.rpm
• krb5-workstation-1.6.1-36.el5_4.1.x86_64.rpm
• krb5-libs-1.3.4-60.el4_7.3.ppc.rpm
• krb5-workstation-1.3.4-62.el4_8.1.s390x.rpm
• krb5-libs-1.6.1-36.el5_4.1.s390x.rpm
• krb5-libs-1.3.4-60.el4_7.3.s390.rpm
• krb5-server-1.3.4-60.el4_7.3.s390x.rpm
• krb5-devel-1.3.4-62.el4_8.1.ppc.rpm
• krb5-devel-1.3.4-62.el4_8.1.ia64.rpm
• krb5-libs-1.6.1-36.el5_4.1.ppc64.rpm
• krb5-workstation-1.3.4-60.el4_7.3.ppc.rpm
• krb5-server-1.3.4-62.el4_8.1.ppc.rpm
• krb5-libs-1.3.4-60.el4_7.3.s390x.rpm
• krb5-devel-1.3.4-60.el4_7.3.x86_64.rpm
• krb5-workstation-1.3.4-62.el4_8.1.ppc.rpm
• krb5-devel-1.3.4-62.el4_8.1.s390.rpm
• krb5-server-1.6.1-36.el5_4.1.ppc.rpm
• krb5-server-1.6.1-36.el5_4.1.s390x.rpm
• krb5-devel-1.6.1-36.el5_4.1.x86_64.rpm
• krb5-server-1.3.4-62.el4_8.1.ia64.rpm
• krb5-libs-1.3.4-60.el4_7.3.i386.rpm
• krb5-server-1.3.4-60.el4_7.3.s390.rpm
• krb5-workstation-1.6.1-36.el5_4.1.s390x.rpm
• krb5-server-1.6.1-36.el5_4.1.i386.rpm
• krb5-workstation-1.3.4-60.el4_7.3.i386.rpm
• krb5-server-1.3.4-62.el4_8.1.x86_64.rpm
• krb5-workstation-1.3.4-60.el4_7.3.s390.rpm
• krb5-workstation-1.6.1-36.el5_4.1.ppc.rpm
• krb5-1.3.4-62.el4_8.1.src.rpm
• krb5-libs-1.3.4-60.el4_7.3.ia64.rpm
• krb5-libs-1.3.4-60.el4_7.3.x86_64.rpm
• krb5-workstation-1.3.4-62.el4_8.1.i386.rpm
• krb5-libs-1.3.4-60.el4_7.3.ppc64.rpm
• krb5-libs-1.6.1-36.el5_4.1.ia64.rpm
• krb5-devel-1.6.1-36.el5_4.1.ia64.rpm
• krb5-devel-1.6.1-36.el5_4.1.i386.rpm
• krb5-server-1.6.1-36.el5_4.1.x86_64.rpm
• krb5-server-1.3.4-60.el4_7.3.ia64.rpm
• krb5-libs-1.3.4-62.el4_8.1.ppc64.rpm
• krb5-libs-1.3.4-62.el4_8.1.i386.rpm
• krb5-devel-1.3.4-60.el4_7.3.s390x.rpm
• krb5-server-1.3.4-60.el4_7.3.i386.rpm
• krb5-libs-1.3.4-62.el4_8.1.x86_64.rpm
• krb5-server-1.3.4-62.el4_8.1.s390x.rpm
• krb5-devel-1.6.1-36.el5_4.1.ppc.rpm
• krb5-devel-1.6.1-36.el5_4.1.s390x.rpm
• krb5-devel-1.3.4-60.el4_7.3.ia64.rpm
• krb5-libs-1.6.1-36.el5_4.1.i386.rpm
• krb5-server-1.3.4-60.el4_7.3.ppc.rpm
• krb5-libs-1.3.4-62.el4_8.1.s390x.rpm
• krb5-devel-1.6.1-36.el5_4.1.s390.rpm
• krb5-1.3.4-60.el4_7.3.src.rpm
• krb5-libs-1.6.1-36.el5_4.1.s390.rpm
• krb5-devel-1.3.4-62.el4_8.1.i386.rpm
• krb5-libs-1.6.1-36.el5_4.1.x86_64.rpm
• krb5-devel-1.3.4-60.el4_7.3.s390.rpm
• krb5-devel-1.3.4-62.el4_8.1.s390x.rpm

Fixes

• This content is not included.BZ - 545015

CVEs

• CVE-2009-4212

References

• http://www.redhat.com/security/updates/classification/#critical
• Content from web.mit.edu is not included.Content from web.mit.edu is not included.http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-004.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.