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Red Hat Enterprise Linux 5: RHSA-2010:0423-01 Critical DoS for KRB5

red hat
Calendar Grey June 5, 2010
Dist Redhat Esm H88
Revised OpenSSH components for CentOS address a critical vulnerability, improving protection in editions 6, 7, and 8.
Updated krb5 packages that fix one security issue are now available for Red Hat Enterprise Linux 3, 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).
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.

Topics%20covered

Topics Covered

security advisory security update DoS Red Hat Enterprise Linux krb5 critical impact

References

https://access.redhat.com/security/cve/CVE-2010-1321 https://access.redhat.com/security/updates/classification#important http://web.mit.edu/Kerberos/advisories/MITKRB5-SA-2010-005.txt

Package List

Red Hat Enterprise Linux AS version 3:
Source:
i386: krb5-debuginfo-1.2.7-72.i386.rpm krb5-devel-1.2.7-72.i386.rpm krb5-libs-1.2.7-72.i386.rpm krb5-server-1.2.7-72.i386.rpm krb5-workstation-1.2.7-72.i386.rpm
ia64: krb5-debuginfo-1.2.7-72.i386.rpm krb5-debuginfo-1.2.7-72.ia64.rpm krb5-devel-1.2.7-72.ia64.rpm krb5-libs-1.2.7-72.i386.rpm krb5-libs-1.2.7-72.ia64.rpm krb5-server-1.2.7-72.ia64.rpm krb5-workstation-1.2.7-72.ia64.rpm
ppc: krb5-debuginfo-1.2.7-72.ppc.rpm krb5-debuginfo-1.2.7-72.ppc64.rpm krb5-devel-1.2.7-72.ppc.rpm krb5-libs-1.2.7-72.ppc.rpm krb5-libs-1.2.7-72.ppc64.rpm krb5-server-1.2.7-72.ppc.rpm krb5-workstation-1.2.7-72.ppc.rpm
s390: krb5-debuginfo-1.2.7-72.s390.rpm krb5-devel-1.2.7-72.s390.rpm krb5-libs-1.2.7-72.s390.rpm krb5-server-1.2.7-72.s390.rpm krb5-workstation-1.2.7-72.s390.rpm
s390x: krb5-debuginfo-1.2.7-72.s390.rpm krb5-debuginfo-1.2.7-72.s390x.rpm krb5-devel-1.2.7-72.s390x.rpm krb5-libs-1.2.7-72.s390.rpm krb5-libs-1.2.7-72.s390x.rpm krb5-server-1.2.7-72.s390x.rpm krb5-workstation-1.2.7-72.s390x.rpm
x86_64: krb5-debuginfo-1.2.7-72.i386.rpm krb5-debuginfo-1.2.7-72.x86_64.rpm krb5-devel-1.2.7-72.x86_64.rpm krb5-libs-1.2.7-72.i386.rpm krb5-libs-1.2.7-72.x86_64.rpm krb5-server-1.2.7-72.x86_64.rpm krb5-workstation-1.2.7-72.x86_64.rpm


Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2010:0423-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2010:0423.html
Issue date: 2010-05-18

Topic

Updated krb5 packages that fix one security issue are now available for RedHat Enterprise Linux 3, 4, and 5.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory security update DoS Red Hat Enterprise Linux krb5 critical impact

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 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 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 WS version 3 - i386, ia64, x86_64

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

Bugs Fixed

582466 - CVE-2010-1321 krb5: null pointer dereference in GSS-API library leads to DoS (MITKRB5-SA-2010-005)

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