[VulnWatch] IBM DB2 db2fmp buffer overflow (#NISR05012005A)

From: NGSSoftware Insight Security Research (nisr_at_nextgenss.com)
Date: 01/05/05

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    To: <bugtraq@securityfocus.com>, <ntbugtraq@listserv.ntbugtraq.com>, <vulnwatch@vulnwatch.org>
Date: Wed, 5 Jan 2005 17:47:09 -0000

    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@ngssoftware.com

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