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Category:   Application (Security)  >   Kerberos Vendors:   MIT
(HP Issues Fix) Kerberos ASN.1 GeneralizedTime Decoder Bug Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1022624
SecurityTracker URL:  http://securitytracker.com/id/1022624
CVE Reference:   CVE-2009-0846   (Links to External Site)
Updated:  Oct 1 2009
Original Entry Date:  Jul 30 2009
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 5
Description:   A vulnerability was reported in Kerberos. A remote user can execute arbitrary code on the target system.

A remote user can send specially crafted ASN.1 encoded data to cause the asn1_decode_generaltime() function to free an uninitialized pointer and potentially execute arbitrary code on the target system. The code will run with the privileges of the target service.

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   HP has issued a fix for Kerberos Web Update (KRB5CLIENT).

B.11.11 (11i v1): KRB5CLIENT_C.1.3.5.09_HP-UX_B.11.11_32_64.depot or subsequent
B.11.23 (11i v2): KRB5CLIENT_D.1.6.2.01_HP-UX_B.11.23_IA_PA.depot or subsequent
B.11.31 (11i v3): KRB5CLIENT_E.1.6.2.03_HP-UX_B.11.31_IA_PA.depot or subsequent

HP has issued a fix for Core-OS (KRB5-Client).

B.11.11 (11i v1): PHSS_39774 or subsequent
B.11.23 (11i v2): PHSS_39765 or subsequent
B.11.31 (11i v3): PHSS_39766 or subsequent

The HP advisory is available at:

https://www13.itrc.hp.com/service/cki/docDisplay.do?docId=emr_na-c01717795

Vendor URL:  web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-002.txt (Links to External Site)
Cause:   Access control error, State error
Underlying OS:  UNIX (HP/UX)
Underlying OS Comments:  11.11, 11.23, 11.31

Message History:   This archive entry is a follow-up to the message listed below.
Apr 7 2009 Kerberos ASN.1 GeneralizedTime Decoder Bug Lets Remote Users Execute Arbitrary Code



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