This update fixes multiple vulnerabilities in krb5. It's unlikely that those vulnerabilities can actually be exploited. (CVE-2007-5894, CVE-2007-5902, CVE-2007-5971, CVE-2007-5972)

From Red Hat Security Advisory 2008:0180 :

Updated krb5 packages that fix multiple security issues are now available for Red Hat Enterprise Linux 4.

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

Kerberos is a network authentication system which allows clients and servers to authenticate to each other through use of symmetric encryption and a trusted third party, the KDC.

A flaw was found in the way the MIT Kerberos Authentication Service and Key Distribution Center server (krb5kdc) handled Kerberos v4 protocol packets. An unauthenticated remote attacker could use this flaw to crash the krb5kdc daemon, disclose portions of its memory, or possibly execute arbitrary code using malformed or truncated Kerberos v4 protocol requests. (CVE-2008-0062, CVE-2008-0063)

This issue only affected krb5kdc with Kerberos v4 protocol compatibility enabled, which is the default setting on Red Hat Enterprise Linux 4. Kerberos v4 protocol support can be disabled by adding 'v4_mode=none' (without the quotes) to the '[kdcdefaults]' section of /var/kerberos/krb5kdc/kdc.conf.

Red Hat would like to thank MIT for reporting these issues.

A double-free flaw was discovered in the GSSAPI library used by MIT Kerberos. This flaw could possibly cause a crash of the application using the GSSAPI library. (CVE-2007-5971)

All krb5 users are advised to update to these erratum packages which contain backported fixes to correct these issues.

The remote host is running a version of Mac OS X 10.5 or 10.4 that does not have the security update 2008-002 applied. 

This update contains several security fixes for a number of programs.

ID	Name	Product	Family	Published	Updated	Severity
29991	openSUSE 10 Security Update : krb5 (krb5-4851)	Nessus	SuSE Local Security Checks	1/16/2008	1/14/2021	critical
67668	Oracle Linux 4 : krb5 (ELSA-2008-0180)	Nessus	Oracle Linux Local Security Checks	7/12/2013	1/14/2021	high
31605	Mac OS X Multiple Vulnerabilities (Security Update 2008-002)	Nessus	MacOS X Local Security Checks	3/19/2008	7/14/2018	critical

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