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Skype "callto:" URI Handler Buffer Overflow Vulnerability Advisory Available in Danish 

Secunia Advisory: SA13191  
Release Date: 2004-11-15
Last Update: 2004-12-07

Critical:
Highly critical
Impact: System access
Where: From remote
Solution Status: Vendor Patch

Software:Skype for Windows 1.x

CVE reference:CVE-2004-1114 (Secunia mirror)

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Description:
Fabian Becker has reported a vulnerability in Skype, which can be exploited by malicious people to compromise a user's system.

The vulnerability is caused due to a boundary error within the handling of command line arguments. This can be exploited to cause a stack-based buffer overflow by e.g. tricking a user into visiting a malicious web site, which passes an overly long string (more than 4096 bytes) to the "callto:" URI handler.

Successful exploitation may allow execution of arbitrary code.

The vulnerability affects versions 1.0.*.94 through 1.0.*.98.

Do you have this product installed on your home computer? Scan using the free Personal Software Inspector. Check if a vulnerable version is installed on computers in your corporate network, using the Network Software Inspector.

Solution:
Update to version 1.0.0.100.
http://www.skype.com/products/skype/windows/

Provided and/or discovered by:
Fabian Becker

Changelog:
2004-11-22: Added link to vendor advisory and updated credits.
2004-12-07: Added CVE reference.

Original Advisory:
http://www.skype.com/security/ssa-2004-02.txt



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

4 Related Secunia Security Advisories

1. Skype File URI Code Execution Vulnerability
2. Skype Cross-Zone Scripting Security Enhancement
3. Skype URL Handling File Disclosure Vulnerability
4. Skype Multiple Buffer Overflow Vulnerabilities


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