IBM DB2 to_char and to_date Denial Of Service (#NISR05012005G)

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

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    Date:         Wed, 5 Jan 2005 17:53:06 -0000
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    NGSSoftware Insight Security Research Advisory

    Name: IBM DB2 to_char and to_date Denial Of Service
    Systems Affected: DB2 8.1
    Severity: High risk from local
    Vendor URL: http://www.ibm.com/
    Author: Chris Anley [ chris at ngssoftware.com ]
    Relates to: http://www.ngssoftware.com/advisories/db2-02.txt
    Date of Public Advisory: 5th January 2005
    Advisory number: #NISR05012005G
    Advisory URL: http://www.ngssoftware.com/advisories/db205012005G.txt

    Description
    ***********
    IBM DB2 is vulnerable to Denial of Service conditions when processing
    certain function calls.

    Details
    *******
    The numbers below are NGS BUGID reference numbers mentioned in
    http://www.ngssoftware.com/advisories/db2-02.txt

    112) If the to_char function is called with an empty string for its
    second parameter, DB2 dereferences a null pointer and terminates:

    select to_char('aaa','') from sysibm.sysdummy1

    113) If the to_date function is called with an empty string for its
    second parameter, DB2 dereferences a null pointer and terminates:

    select to_date('aaa', '') from sysibm.sysdummy1

    In both cases, DB2 must be restarted in order to restore normal
    functionality.

    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.ngssoftware.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

    --
    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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