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Highly critical

Easy Chat Server Multiple Vulnerabilities

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Release Date:  2007-08-15    Last Update:  2011-08-15    Views:  7,173

Secunia Advisory SA26461

Where:

From remote

Impact:

Security Bypass, System access

Solution Status:

Partial Fix

CVE Reference(s):

Description


Some vulnerabilities have been discovered in Easy Chat Server, which can be exploited by malicious people to bypass certain security restrictions or compromise a vulnerable system.

1) The vulnerability is caused due to a boundary error in EasyChat.exe when processing the "username" parameter sent to the application through "chat.ghp". This can be exploited to cause a stack-based buffer overflow via a specially crafted HTTP request containing an overly long (greater than 256 bytes) "username" parameter.

Successful exploitation allows execution of arbitrary code.

2) The application does not properly restrict access to the "registresult.htm" POST action. This can be exploited to create new and modify existing users by posting to the file directly.

The vulnerabilities are confirmed in version 2.2. Other versions may also be affected.


Solution:
Update to version 2.5, which fixes vulnerability #2. Restrict network access to the administrative web interface.

Provided and/or discovered by:
1) NetJackal
2) Mountassif Moad

Original Advisory:
NetJackal:
http://www.exploit-db.com/exploits/4289

Mountassif Moad:
http://www.exploit-db.com/exploits/8149

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: Easy Chat Server Multiple Vulnerabilities

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