IBM DB2 SATADMIN.SATENCRYPT buffer overflow (#NISR05012005E)
From: NGSSoftware Insight Security Research (nisr_at_nextgenss.com)
To: <email@example.com>, <firstname.lastname@example.org>, <email@example.com> Date: Wed, 5 Jan 2005 17:51:29 -0000
NGSSoftware Insight Security Research Advisory
Name: IBM DB2 SATADMIN.SATENCRYPT buffer overflow
Systems Affected: DB2 8.1
Severity: Medium risk from remote
Vendor URL: http://www.ibm.com/
Author: David Litchfield [ david at ngssoftware.com ]
Relates to: http://www.nextgenss.com/advisories/db2-02.txt
Date of Public Advisory: 5th January 2005
Advisory number: #NISR05012005E
Advisory URL: http://www.ngssoftware.com/advisories/db205012005E.txt
IBM's DB2 database server, when configured for Satellite Administration
includes a number of SQL functions. One of these, the SATENCRYPT function
suffers from a stack based buffer overflow vulnerability.
The SATENCRYPT function in the SATADMIN schema is vulnerable to a classic
stack based overflow. The satencrypt function is exported by db2prom.dll and
one of it's subfunctions creates a 40 byte buffer. User supplied data is
copied to the buffer until a null terminator is reached in a while loop. By
passing a parameter longer than 40 bytes allows the attacker to overflow the
buffer and overwrite the saved return address. By exploiting this an
attacker can gain elevated privileges.
Note - by default, public cannot execute this function.
IBM has written a patch and can be obtained with the latest fixpak.
NGSSQuirreL for DB2 (http://www.nextgenss.com/db2.htm) can be used to assess
whether your DB2 server is vulnerable to this.
NGSSoftware design, research and develop intelligent, advanced application
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