full-disclosure - Ethereal (v0.10.0-0.10.2) IGAP Dissector Message Overflow Exploit

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From: lists2 at onryou.com (Cael Abal)
Subject: Ethereal (v0.10.0-0.10.2) IGAP Dissector Message
 Overflow Exploit

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Lan Guy wrote:

| is ethereal ver 0.10.3 released 25th March 2004 still vulnerable?

0.10.3 was released in response to multiple vulnerabilities, one of
which included a buffer overflow in the IGAP dissector attributed to
Stefan Esser.

http://security.e-matters.de/advisories/032004.html

The important bit:

"When parsing an IGAP protocol packet that contains either an overlong
accountname (>17) or an overlong message (>65) different buffers may
overflow the stack, allowing an over-write of up to 238 (or 190) bytes.
In both cases remote code execution exploitation is possible."

The posted code generates an oversized message, exploiting the buffer
overflow fixed in 0.10.3.

Cael

PS:  Do your own homework next time.
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