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Moderately critical

Microsoft ISA Server Security Bypass Vulnerability

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Release Date:  2009-07-14    Views:  6,909

Secunia Advisory SA35784

Where:

From remote

Impact:

Security Bypass

Solution Status:

Vendor Patch

CVE Reference(s):

Description


A vulnerability has been reported in Microsoft ISA Server, which can be exploited by malicious people to bypass certain security restrictions.

The vulnerability is caused due to an unspecified error when authenticating requests using the HTTP-Basic method, which can be exploited to access a web published resource.

Successful exploitation requires knowledge of a valid administrative user name and that the ISA server is configured for Radius One Time Password (OTP) authentication and authentication delegation with Kerberos Constrained Delegation.

NOTE: This can further be exploited to completely compromise a system relying on the ISA Server 2006 Web publishing rules for authentication.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Reported by the vendor.

Original Advisory:
MS09-031 (KB970811, KB971143):
http://www.microsoft.com/technet/security/Bulletin/MS09-031.mspx

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: Microsoft ISA Server Security Bypass Vulnerability

User Message
[+]

martinageo

RE: Microsoft ISA Server Security Bypass Vulnerability
This reply has been minimised due to a negative Relevancy Score.

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