Buffer Overflow Vulnerability in WideChapter Internet Browser for Windows

Reported September 18, 2003, by Bahaa Naamneh.

VERSIONS AFFECTED

• WideChapter Internet Browser for Windows

DESCRIPTION

A vulnerability in WideChapter Internet Browser for Windows can result in the execution of arbitrary code on the vulnerable system. By initiating a long HTTP request, an attacker can cause a buffer overflow in WideChapter. This overflow permits modification of the Execution Instruction Point, which lets the attacker execute arbitrary code.

DEMONSTRATION

The discoverer posted the following code as proof of concept:

By embedding the following JavaScript into a web page: < script>window.open(http://AAA.. \[Ax517\])</script>, it is possible to cause the EIP to overwrite once a user visits the web page.

An exploit for Windows XP Home has created and is available for download from: http://www.elitehaven.net/wcexploit.zip

VENDOR RESPONSE

WideChapter has been notified.

CREDIT                                                                                                       
Discovered by Bahaa Naamneh.