Family: Debian Local Security Checks --> Category: infos
[DSA266] DSA-266-1 krb5 Vulnerability Scan
Vulnerability Scan Summary
Detailed Explanation for this Vulnerability Test
Several vulnerabilities have been discovered in krb5, an
implementation of MIT Kerberos.
Kerberos version 5 does not contain this cryptographic
vulnerability. Sites are not vulnerable if they have Kerberos v4
completely disabled, including the disabling of any krb5 to krb4
This version of the krb5 package changes the default behavior and
disallows cross-realm authentication for Kerberos version 4. Because
of the fundamental nature of the problem, cross-realm authentication
in Kerberos version 4 cannot be made secure and sites should avoid its
use. A new option (-X) is provided to the krb5kdc and krb524d
commands to re-enable version 4 cross-realm authentication for those
sites that must use this functionality but desire the other security
For the stable distribution (woody) this problem has been
fixed in version 1.2.4-5woody4.
The old stable distribution (potato) does not contain krb5 packages.
For the unstable distribution (sid) this problem will be fixed soon.
We recommend that you upgrade your krb5 package.
Solution : http://www.debian.org/security/2003/dsa-266
Threat Level: High
Click HERE for more information and discussions on this network vulnerability scan.