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 Description *********** 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. Details ******* 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. Fix Information *************** IBM has written a patch and can be obtained with the latest fixpak. http://www-306.ibm.com/software/data/db2/udb/support/downloadv8.html - DB2 v8.1 http://www-306.ibm.com/software/data/db2/udb/support/downloadv7.html - DB2 v7.x NGSSQuirreL for DB2 (http://www.nextgenss.com/db2.htm) can be used to assess whether your DB2 server is vulnerable to this. About NGSSoftware ***************** NGSSoftware design, research and develop intelligent, advanced application security assessment scanners. Based in the United Kingdom, NGSSoftware have offices in the South of London and the East Coast of Scotland. NGSSoftware's sister company NGSConsulting, offers best of breed security consulting services, specialising in application, host and network security assessments. http://www.ngssoftware.com/ Telephone +44 208 401 0070 Fax +44 208 401 0076 enquiries@private
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