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Red Hat 2010:0926-01 Moderate: krb5 Authentication Flaw

red hat
Calendar Grey November 30, 2010
Dist Redhat Esm H88
Minor revision of krb5 tackles vulnerabilities present in Red Hat Enterprise Linux versions 4 and 5. Discover additional details.
Updated krb5 packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4 and 5

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

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 checksum validation flaws were discovered in the MIT Kerberos implementation. A remote attacker could use these flaws to tamper with certain Kerberos protocol packets and, possibly, bypass authentication mechanisms in certain configurations using Single-use Authentication Mechanisms. (CVE-2010-1323)
Red Hat would like to thank the MIT Kerberos Team for reporting these issues.
All krb5 users should upgrade to these updated packages, which contain a backported patch to correct these issues. After installing the updated packages, the krb5kdc daemon will be restarted automatically.

Topics%20covered

Topics Covered

security advisory network security Red Hat moderate risk krb5 update authentication flaw checksum issue

References

https://access.redhat.com/security/cve/CVE-2010-1323 https://access.redhat.com/security/updates/classification#moderate http://web.mit.edu/Kerberos/advisories/MITKRB5-SA-2010-007.txt

Package List

Red Hat Enterprise Linux AS version 4:
Source:
i386: krb5-debuginfo-1.3.4-62.el4_8.3.i386.rpm krb5-devel-1.3.4-62.el4_8.3.i386.rpm krb5-libs-1.3.4-62.el4_8.3.i386.rpm krb5-server-1.3.4-62.el4_8.3.i386.rpm krb5-workstation-1.3.4-62.el4_8.3.i386.rpm
ia64: krb5-debuginfo-1.3.4-62.el4_8.3.i386.rpm krb5-debuginfo-1.3.4-62.el4_8.3.ia64.rpm krb5-devel-1.3.4-62.el4_8.3.ia64.rpm krb5-libs-1.3.4-62.el4_8.3.i386.rpm krb5-libs-1.3.4-62.el4_8.3.ia64.rpm krb5-server-1.3.4-62.el4_8.3.ia64.rpm krb5-workstation-1.3.4-62.el4_8.3.ia64.rpm
ppc: krb5-debuginfo-1.3.4-62.el4_8.3.ppc.rpm krb5-debuginfo-1.3.4-62.el4_8.3.ppc64.rpm krb5-devel-1.3.4-62.el4_8.3.ppc.rpm krb5-libs-1.3.4-62.el4_8.3.ppc.rpm krb5-libs-1.3.4-62.el4_8.3.ppc64.rpm krb5-server-1.3.4-62.el4_8.3.ppc.rpm krb5-workstation-1.3.4-62.el4_8.3.ppc.rpm
s390: krb5-debuginfo-1.3.4-62.el4_8.3.s390.rpm krb5-devel-1.3.4-62.el4_8.3.s390.rpm krb5-libs-1.3.4-62.el4_8.3.s390.rpm krb5-server-1.3.4-62.el4_8.3.s390.rpm krb5-workstation-1.3.4-62.el4_8.3.s390.rpm
s390x: krb5-debuginfo-1.3.4-62.el4_8.3.s390.rpm krb5-debuginfo-1.3.4-62.el4_8.3.s390x.rpm krb5-devel-1.3.4-62.el4_8.3.s390x.rpm krb5-libs-1.3.4-62.el4_8.3.s390.rpm krb5-libs-1.3.4-62.el4_8.3.s390x.rpm krb5-server-1.3.4-62.el4_8.3.s390x.rpm

Read the Full Advisory


Advisory ID: RHSA-2010:0926-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2010:0926.html
Issue date: 2010-11-30

Topic

Updated krb5 packages that fix multiple security issues are now availablefor Red Hat Enterprise Linux 4 and 5.The Red Hat Security Response Team has rated this update as having moderatesecurity impact. A Common Vulnerability Scoring System (CVSS) base score,which gives a detailed severity rating, is available from the CVE link inthe References section.

Topics%20covered

Topics Covered

security advisory network security Red Hat moderate risk krb5 update authentication flaw checksum issue

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 AS version 4 - 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 4 - i386, ia64, x86_64

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

Bugs Fixed

648734 - CVE-2010-1323 krb5: incorrect acceptance of certain checksums (MITKRB5-SA-2010-007)

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