NGSSoftware Insight Security Research Advisory Name: IBM DB2 db2fmp buffer overflow Systems Affected: DB2 8.1/7.x Severity: High risk from local 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: #NISR05012005A Advisory URL: http://www.ngssoftware.com/advisories/db205012005A.txt Description *********** IBM's DB2 database server suffers from a local attack whereby passing an overly parameter to the db2fmp binary will overflow a stack based buffer. Details ******* db2fmp is used for running fenced libraries. A fenced library is one that is not loaded into the main DB2 process so in the event of an error the server is not taken down as well. On unix based versions of DB2, db2fmp is installed setuid root. Exploiting this buffer overrun can allow a local attacker to gain root privileges. Note - Some versions may drop root privileges before the overflow can be exploited. Note - Whilst the overflow is present on Windows platforms it cannot be exploited to gain elevated privileges. 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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