Red Hat Bugzilla – Bug 432620
CVE-2008-0062 krb5: uninitialized pointer use in krb5kdc
Last modified: 2010-02-24 00:07:54 EST
MIT Kerberos Team reported following issue affecting MIT Kerberos 5 KDC with
Kerberos 4 support enabled:
CVE-2008-0062: A global variable holding a pointer to the message to
be sent back to the client is only set for two recognized krb4 message
types, but may be used (and freed) in additional cases, resulting in
use of a null or dangling pointer.
Red Hat would like to thank MIT for reporting this issue.
Created attachment 294787 [details]
Upstream patch for CVE-2008-0062 and CVE-2008-0063
This issue affects krb5 packages as shipped in Red Hat Enterprise Linux 2.1, 3,
4 and 5 and current versions of Fedora. Support for Kerberos v4 is not assumed
by default by krb5kdc on Red Hat Enterprise Linux 5 and Fedora, however default
configuration in kdc.conf enables this support explicitly (in nopreauth mode,
which is assumed and configured as default on Red Hat Enterprise Linux 2.1, 3
Possible workaround -- disable v4 support if it's not needed -- in kdc.conf, set
v4_mode to none.
krb5-1.6.1-9.fc7 has been submitted as an update for Fedora 7
krb5-1.6.2-14.fc8 has been submitted as an update for Fedora 8
krb5-1.6.1-9.fc7 has been pushed to the Fedora 7 stable repository. If problems still persist, please make note of it in this bug report.
krb5-1.6.2-14.fc8 has been pushed to the Fedora 8 stable repository. If problems still persist, please make note of it in this bug report.
This issue was addressed in:
Red Hat Enterprise Linux: