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Category:   Application (Security)  >   Kerberos Vendors:   MIT
(Sun Issues Advisory) Kerberos GSS-API SPNEGO Null Pointer Dereference and Invalid Memory Access Bugs Let Remote Denial of Service
SecurityTracker Alert ID:  1022012
SecurityTracker URL:  http://securitytracker.com/id/1022012
CVE Reference:   CVE-2009-0844, CVE-2009-0845   (Links to External Site)
Date:  Apr 8 2009
Impact:   Denial of service via network
Vendor Confirmed:  Yes  
Version(s): 5
Description:   Two vulnerabilities were reported in Kerberos. A remote user can cause denial of service conditions.

A remote user can cause the SPNEGO GSS-API get_input_token() function to read beyond the end of a network input buffer and crash [CVE-2009-0844]. Apple Security reported this vulnerability.

A remote user can supply specially crafted ContextFlags in the reqFlags field in NegTokenInit to trigger a null pointer dereference in spnego_gss_accept_sec_context() and cause the target krb5 daemon to crash [CVE-2009-0845].

Impact:   A remote user can cause the target daemon to crash.
Solution:   Sun is working on a fix.

The Sun advisory is available at:

http://sunsolve.sun.com/search/document.do?assetkey=1-66-256728-1

Vendor URL:  web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-001.txt (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  UNIX (Solaris - SunOS)
Underlying OS Comments:  9, 10, OpenSolaris

Message History:   This archive entry is a follow-up to the message listed below.
Mar 20 2009 Kerberos GSS-API SPNEGO Null Pointer Dereference and Invalid Memory Access Bugs Let Remote Denial of Service



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