TippingPoint Zero Day Initiative

Skype URI Processing Arbitrary XML File Deletion Vulnerability

ZDI-10-028: March 11th, 2010

CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8329. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to remove arbitrary XML files on vulnerable installations of Skype. User interaction is required to exploit this vulnerability in that the target must visit a malicious page.

The specific flaw exists in Skype's handling of the 'skype-plugin:' protocol. An attacker can specify a malicious URI, that upon clicking, will trigger the deletion of an arbitrary attacker specified XML file.

Vendor Response

Skype states:


Disclosure Timeline

    2009-07-14 - Vulnerability reported to vendor
    2010-03-11 - Coordinated public release of advisory


This vulnerability was discovered by: