IBM DB2 to_char and to_date Denial Of Service
January 5th, 2005NGSSoftware 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
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IBM DB2 is vulnerable to Denial of Service conditions when processing
certain function calls.
Details
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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
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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
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NGSSoftware design, research and develop intelligent, advanced
application security assessment scanners. Based in the United Kingdom,
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Scotland. NGSSoftware’s sister company NGSConsulting, offers best of
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and network security assessments.
http://www.ngssoftware.com/
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