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SQL Server Named Pipe Privilege Escalation Vulnerability

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Release Date:  2003-07-11    Views:  10,396

Secunia Advisory SA9229

Where:

Local system

Impact:

Privilege escalation

Solution Status:

Vendor Patch

CVE Reference(s):

Description


A vulnerability has been identified in SQL Server, which can be exploited by malicious, local users to escalate their privileges on a vulnerable system.

The vulnerability is caused due to a general error in the "CreateFile" API and an attack vector exists in SQL Server making it possible to gain the privileges of the SQL Server. This can be exploited by specifying the UNC name of a named pipe instead of a file as an argument to the "xp_fileexist" extended stored procedure.

An example is included in the original advisory.


Solution:
Generally, only trusted administrators should be allowed access to a server. Furthermore, services should be run with as few privileges as possible.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Andreas Junestam (@stake)

Original Advisory:
http://www.atstake.com/research/advisories/2003/a070803-1.txt

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: SQL Server Named Pipe Privilege Escalation Vulnerability

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