bugtraq - Skype URI callto username overflow

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Message-ID: <20040610004645.12250.qmail@www.securityfocus.com>
Date: 10 Jun 2004 00:46:45 -0000
From: Hillel Himovich <hll@...vision.net.il>
To: bugtraq@...urityfocus.com
Subject: Skype URI callto username overflow

Here is a cute little URI I found crashing skype on it's latest version (0.98.0.04).
It's proboby a buffer overflow of some sort, so, a special crafted URI culd potentionally lead to remote code execution.
(would probobly be extreamly hard doing it threw a URI, but still an option)

callto://aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/

If you really really want this not to happend to you, u shuld remove the reffering registry entrance to "callto://" in URI's

Regards,
Hillel Himovich
"HLL"
HLL@...vision.net.il