Bug: DoS attacks using SQL Wildcards - White Paper ( Ascii Version )

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DoS attacks using SQL Wildcards - White Paper

Published
Credit
Risk
2008.05.21
Ferruh Mavituna
Low
CWE
CVE
Local
Remote
CWE-89
CVE-2008-2391
No
Yes

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.8/10
6.9/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete

This paper discusses abusing Microsoft SQL Query wildcards to consume
CPU in database servers using only the search field present in most
common web applications.

It can be downloaded from
http://www.portcullis-security.com/uplds/wildcard_attacks.pdf

Majority of the Microsoft SQL Server based web applications are
vulnerable to this attack. Other databases could be vulnerable
depending on how the applications implement search functionalities
although common implementation of the search functionality in SQL
Server back-end applications is vulnerable.

There are real world scenarios and detailed analysis in the paper
which explains and shows the impact of this attack.

Regards,

--
Ferruh Mavituna

See this note in TXT Version

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Ascii Version