krb5 -- KDC null pointer dereference in TGS handling

Description:

The MIT Kerberos Team reports:

In releases krb5-1.9 and later, the KDC can crash due to a NULL pointer dereference in code that handles TGS (Ticket Granting Service) requests. The trigger condition is trivial to produce using unmodified client software, but requires the ability to authenticate as a principal in the KDC's realm.

References:

• CVE name CVE-2011-1530
• URL: <http://web.mit.edu/kerberos/www/advisories/MITKRB5-SA-2011-007.txt>

Affects:

• krb5 >=1.9 <1.9.2_1

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