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Red Hat Enterprise Linux RHSA-2010:0029-01 Critical: KDC DoS Threat

red hat
Calendar Grey January 12, 2010
Dist Redhat Esm H88
Essential patch for Red Hat Enterprise Linux addressing various vulnerabilities in krb5 to avert serious risks.
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 ...

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

Summary

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.

Topics%20covered

Topics Covered

security advisory denial of service critical code execution kerberos red hat enterprise linux kdc

References

https://access.redhat.com/security/cve/CVE-2009-4212 https://access.redhat.com/security/updates/classification#critical http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-004.txt

Package List

Red Hat Enterprise Linux AS version 3:
Source:
i386: krb5-debuginfo-1.2.7-71.i386.rpm krb5-devel-1.2.7-71.i386.rpm krb5-libs-1.2.7-71.i386.rpm krb5-server-1.2.7-71.i386.rpm krb5-workstation-1.2.7-71.i386.rpm
ia64: krb5-debuginfo-1.2.7-71.i386.rpm krb5-debuginfo-1.2.7-71.ia64.rpm krb5-devel-1.2.7-71.ia64.rpm krb5-libs-1.2.7-71.i386.rpm krb5-libs-1.2.7-71.ia64.rpm krb5-server-1.2.7-71.ia64.rpm krb5-workstation-1.2.7-71.ia64.rpm
ppc: krb5-debuginfo-1.2.7-71.ppc.rpm krb5-debuginfo-1.2.7-71.ppc64.rpm krb5-devel-1.2.7-71.ppc.rpm krb5-libs-1.2.7-71.ppc.rpm krb5-libs-1.2.7-71.ppc64.rpm krb5-server-1.2.7-71.ppc.rpm krb5-workstation-1.2.7-71.ppc.rpm
s390: krb5-debuginfo-1.2.7-71.s390.rpm krb5-devel-1.2.7-71.s390.rpm krb5-libs-1.2.7-71.s390.rpm krb5-server-1.2.7-71.s390.rpm krb5-workstation-1.2.7-71.s390.rpm
s390x: krb5-debuginfo-1.2.7-71.s390.rpm krb5-debuginfo-1.2.7-71.s390x.rpm krb5-devel-1.2.7-71.s390x.rpm krb5-libs-1.2.7-71.s390.rpm krb5-libs-1.2.7-71.s390x.rpm krb5-server-1.2.7-71.s390x.rpm krb5-workstation-1.2.7-71.s390x.rpm
x86_64: krb5-debuginfo-1.2.7-71.i386.rpm krb5-debuginfo-1.2.7-71.x86_64.rpm krb5-devel-1.2.7-71.x86_64.rpm krb5-libs-1.2.7-71.i386.rpm krb5-libs-1.2.7-71.x86_64.rpm krb5-server-1.2.7-71.x86_64.rpm krb5-workstation-1.2.7-71.x86_64.rpm


Read the Full Advisory


Severity
critical
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2010:0029-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2010:0029.html
Issue date: 2010-01-12

Topic

Updated krb5 packages that fix multiple security issues are now availablefor 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 RedHat Security Response Team.

Topics%20covered

Topics Covered

security advisory denial of service critical code execution kerberos red hat enterprise linux kdc

Relevant Releases Architectures

RHEL Desktop Workstation (v. 5 client) - i386, x86_64

Red Hat Desktop version 3 - i386, x86_64

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

Red Hat Enterprise Linux (v. 5.2.z server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux (v. 5.3.z server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux AS version 3 - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux AS version 4 - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux AS version 4.7.z - i386, ia64, ppc, s390, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Red Hat Enterprise Linux Desktop version 4 - i386, x86_64

Red Hat Enterprise Linux ES version 3 - i386, ia64, x86_64

Red Hat Enterprise Linux ES version 4 - i386, ia64, x86_64

Red Hat Enterprise Linux ES version 4.7.z - i386, ia64, x86_64

Red Hat Enterprise Linux WS version 3 - i386, ia64, x86_64

Red Hat Enterprise Linux WS version 4 - i386, ia64, x86_64

Bugs Fixed

545015 - CVE-2009-4212 krb: KDC integer overflows in AES and RC4 decryption routines (MITKRB5-SA-2009-004)

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