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Insecure Library Loading
Moderately critical

Mongoose Multiple Vulnerabilities

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Release Date:  2009-10-16    Last Update:  2010-12-28    Views:  3,485

Secunia Advisory SA36934

Where:

From remote

Impact:

Security Bypass, Exposure of sensitive information, DoS

Solution Status:

Unpatched

Software:

CVE Reference(s):

Description


Some vulnerabilities have been in Mongoose, which can be exploited by malicious people to bypass certain security restrictions, disclose sensitive information, and cause a DoS (Denial of Service).

1) An error within the handling of HTTP requests can be exploited to disclose the source code of certain scripts (e.g. PHP) by appending "::$DATA" or "/" to a URI.

2) An error when handling HTTP requests containing 8.3 aliases (short file names) can be exploited to access normally restricted directories or disclose a script's source code.

3) An error exists when determining if a requested file should be handled as a script. This can be exploited to trigger the interpretation of e.g. ".phpx" files as ".php" scripts by requesting their 8.3 alias.

4) An error when handling certain HTTP requests can be exploited to access file outside of the web root via directory traversal attacks.

5) A signedness error in the "discard_current_request_from_buffer()" function can be exploited to cause the process to crash via a specially crafted web request with a negative value in the "Content-Length" header.

This vulnerability is confirmed in version 2.11.

The other vulnerabilities are confirmed in version 2.8. Other versions may also be affected.


Solution:
Filter malicious requests with a proxy.

Provided and/or discovered by:
1) Dr_IDE
2, 3) Dan Crowley, Core Security Technologies
4) Gerardo Richarte, Core Security Technologies
5) John Leitch

Original Advisory:
Dr_IDE:
http://pocoftheday.blogspot.com/2009/10/mongoose-web-server-v280-remote-source.html
http://pocoftheday.blogspot.com/2009/10/mongoose-web-server-v280-remote-source_22.html

Core Security Technologies:
http://www.coresecurity.com/content/filename-pseudonyms-vulnerabilities

Mongoose:
http://code.google.com/p/mongoose/issues/detail?id=90

John Leitch:
http://www.johnleitch.net/Vulnerabilities/Mongoose.2.11.Denial.Of.Service/74

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: Mongoose Multiple Vulnerabilities

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