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Insecure Library Loading
Moderately critical

Microsoft Internet Information Services FTP Server NLST Buffer Overflow

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Release Date:  2009-09-01    Last Update:  2009-10-13    Views:  11,731

Secunia Advisory SA36443

Where:

From remote

Impact:

DoS, System access

Solution Status:

Vendor Patch

CVE Reference(s):

Description


Kingcope has discovered a vulnerability in Microsoft Internet Information Services (IIS), which can be exploited by malicious users to cause a DoS (Denial of Service) or compromise a vulnerable system.

The vulnerability is caused due to a boundary error in the FTP server when processing NLST commands. This can be exploited to cause a stack-based buffer overflow by issuing a specially crafted NLST command.

Successful exploitation may allow execution of arbitrary code, but would usually require write permissions to create a directory with a specially crafted name.

The vulnerability is confirmed as a DoS in IIS 5.1 for Windows XP SP3 and in IIS 6.0 for Windows Server 2003, and reported as code execution in IIS 5.0 for Windows 2000 SP4. Other versions may also be affected.


Solution:
Apply patches.

Further details available to Secunia VIM customers

Provided and/or discovered by:
Kingcope

Original Advisory:
Microsoft (KB975254):
http://www.microsoft.com/technet/security/Bulletin/MS09-053.mspx

Microsoft:
http://www.microsoft.com/technet/security/advisory/975191.mspx
http://blogs.technet.com/srd/archive/2009/09/01/new-vulnerability-in-iis5-and-iis6.aspx

Kingcope:
http://milw0rm.com/exploits/9541

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 Internet Information Services FTP Server NLST Buffer Overflow

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