[NEWS] Denial of Service Vulnerability in DB2 Discovery Service

From: SecuriTeam (support_at_securiteam.com)
Date: 09/21/03

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Date: 21 Sep 2003 13:45:51 +0200

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      Denial of Service Vulnerability in DB2 Discovery Service
    ------------------------------------------------------------------------

    SUMMARY

    IBM DB2 provides a UDP service used as a discovery service for locating
    DB2 databases on the network. This UDP service shuts down when sent more
    than 20 bytes.

    DETAILS

    IBM DB2 is a database that provides many services. One of these services
    is a discovery service. This is used to locate a service when configuring
    a connection. This service listens on UDP port 523.

    This service typically receives a packet such as "DB2GETADDR SQL07020". If
    a packet larger than 20 bytes is received by the server, the service will
    shutdown.

    Once the discovery service crashes, the service "DB2 - DB2DAS00" must be
    restarted.

    This issue is cover under the fix "IY47686: Search Discovery Listener
    Denial of Service Vulnerability".

    Fix:
    Apply FixPak 10a from IBM. This can be downloaded from the following
    location:
    <http://www-3.ibm.com/cgi-bin/db2www/data/db2/udb/winos2unix/support/download.d2w/report> http://www-3.ibm.com/cgi-bin/db2www/data/db2/udb/winos2unix/support/download.d2w/report.

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:aaron@newman-family.com>
    Aaron C. Newman of Application Security, Inc.

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