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Easy Chat Server Multiple Vulnerabilities
Secunia Advisory: SA12006
Release Date: 2004-07-05
Last Update: 2005-08-22
Popularity: 8,803 views

Critical:
Highly critical
Impact: Cross Site Scripting
DoS
System access
Where: From remote
Solution Status: Unpatched

Software:Easy Chat Server 1.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

Description:
Multiple vulnerabilities have been reported in Easy Chat Server, allowing malicious people to cause a DoS (Denial of Service), conduct cross-site scripting attacks, and potentially compromise a vulnerable system.

1) A boundary error within the handling of usernames can be exploited to cause a buffer overflow via an overly long string (about 300 bytes) passed to the "username" parameter in "chat.ghp".

Example:
http://[victim]/chat.ghp?username=[long_string]&password=&room=1&sex=0

Successful exploitation may allow execution of arbitrary code.

2) It is reportedly possible to crash the application by logging into a room with a large number of users.

3) An input validation error within the handling of usernames can be exploited to execute arbitrary HTML or script code in a user's browser session in context of a vulnerable site by tricking the user into visiting a malicious website or click a specially crafted link.

Example:
http://[victim]/chat.ghp?username=">[code]&password=&room=1&sex=0

The vulnerabilities have been reported in version 1.2. Prior versions may also be affected.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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