IBM DB2 rec2xml buffer overflow vulnerability (#NISR2122004J)

From: NGSSoftware Insight Security Research (nisr_at_NEXTGENSS.COM)
Date: 12/23/04

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    Date:         Thu, 23 Dec 2004 17:01:16 -0000
    To: NTBUGTRAQ@LISTSERV.NTBUGTRAQ.COM
    
    

    NGSSoftware Insight Security Research Advisory

    Name: IBM DB2 rec2xml buffer overflow
    Systems Affected: DB2 8.1/7.x
    Severity: High risk
    Vendor URL: http://www.ibm.com/
    Author: David Litchfield [ mark at ngssoftware.com ]
    Relates to: http://www.nextgenss.com/advisories/db2-01.txt
    Date of Public Advisory: 23rd December 2004
    Advisory number: #NISR2122004J
    Advisory URL: http://www.ngssoftware.com/advisories/db223122004K.txt

    Description
    ***********
    IBM's DB2 database server contains a function, rec2xml, used to format a
    string in XML. This function suffers from a stack based buffer overflow
    vulnerability.

    Details
    *******
    By passing an overly long 3rd parameter to the rec2xml function a stack
    based buffer can be overflowed, overwriting the saved return address on the
    stack. This allows an attacker to control the flow of execution and the
    opportunity to execute arbitrary code.

    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@ngssoftware.com

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