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IBM DB2 XML functions overflows (#NISR05012005H)
From: "NGSSoftware Insight Security Research" <nisr () nextgenss com>
Date: Wed, 5 Jan 2005 17:53:54 -0000
NGSSoftware Insight Security Research AdvisoryName: IBM DB2 XML functions overflowsSystems Affected: DB2 8.1Severity: High risk from remoteVendor URL:http://www.ibm.com/Author: David Litchfield [ david at ngssoftware.com ]Relates to:http://www.nextgenss.com/advisories/db2-02.txtDate of Public Advisory: 5th January 2005Advisory number: #NISR05012005HAdvisory URL:http://www.ngssoftware.com/advisories/db205012005H.txtDescription***********IBM's DB2 database server contain four XML functions that suffer from stackbased buffer overflow vulnerabilities.Details*******The xmlvarcharfromfile suffers from a buffer overflow vulnerability. Whenand only when, 94 bytes are supplied for the second argument a pointer tothe user supplied string is written over the saved return address so whenucnv_open_2_0 (in db2xmlfn.dll) returns - it does so into the string. Thisallows an attacker to run arbitrary code and elevate privileges.The xmlclobfromfile, xmlfilefromvarchar and xmlfilefromclob functions arealso vulnerable.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 - DB2v8.1http://www-306.ibm.com/software/data/db2/udb/support/downloadv7.html - DB2v7.xNGSSQuirreL for DB2 (http://www.nextgenss.com/db2.htm) can be used to assesswhether your DB2 server is vulnerable to this.About NGSSoftware*****************NGSSoftware design, research and develop intelligent, advanced applicationsecurity assessment scanners. Based in the United Kingdom, NGSSoftware haveoffices in the South of London and the East Coast of Scotland. NGSSoftware'ssister company NGSConsulting, offers best of breed security consultingservices, specialising in application, host and network securityassessments.http://www.ngssoftware.com/Telephone +44 208 401 0070Fax +44 208 401 0076enquiries () ngssoftware com
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