IBM DB2 buffer overflow (#NISR05012005B)

From: NGSSoftware Insight Security Research (nisr_at_NEXTGENSS.COM)
Date: 01/05/05

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    Date:         Wed, 5 Jan 2005 17:48:35 -0000

    NGSSoftware Insight Security Research Advisory

    Name: IBM DB2 buffer overflow
    Systems Affected: DB2 8.1/7.x
    Severity: High risk from local
    Vendor URL:
    Author: David Litchfield [ david at ]
    Relates to:
    Date of Public Advisory: 5th January 2005
    Advisory number: #NISR05012005B
    Advisory URL:

    ***********, one of the libraries supplied with IBM's DB2 database server
    suffers from a buffer overflow vulnerability.

    This vulnerability can be divided into two separate issues. Firstly, when is loaded it reads the DBLPORT environment variable and copies the
    value to a buffer in the .bss section. This buffer is overflowed. By
    providing an overly long DB2LPORT environment variable it fills the
    db2MLNPort_name buffer in the .bss section of - then spills over
    into the db2node_name buffer, into the instprof_path buffer, into the
    instance_path buffer and so on all the way into the install_path buffer.
    Secondly, when the sqloInstancePath() reads the install_path we overflow a
    local stack based buffer of sqloGetInstancePath().

    This can be exploited to gain root privileges. For example, db2cacpy is
    setuid root. This program loads the library and calls sqloInstancePath()
    overflowing the buffer.

    Fix Information
    IBM has written a patch and can be obtained with the latest fixpak. - DB2
    v8.1 - DB2

    NGSSQuirreL for DB2 ( 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

    Telephone +44 208 401 0070
    Fax +44 208 401 0076

    NTBugtraq Editor's Note:
    Most viruses these days use spoofed email addresses. As such, using an Anti-Virus product which automatically notifies the perceived sender of a message it believes is infected may well cause more harm than good. Someone who did not actually send you a virus may receive the notification and scramble their support staff to find an infection which never existed in the first place. Suggest such notifications be disabled by whomever is responsible for your AV, or at least that the idea is considered.

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