Skype Protocol Handler datapath Argument Injection Remote Code Execution VulnerabilityZDI-10-027: March 11th, 2010
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8328. For further product information on the TippingPoint IPS:
This vulnerability allows remote attackers to execute arbitrary code 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 with how the OS web-browser passes command line arguments to Skype through the registered 'skype:' protocol handler. Insufficient sanity checking to the /datapath argument allows an attacker to construct a link that will execute Skype with arbitrary arguments. This can be abused to specify a remote configuration storage directory which can be leveraged to glean target user credentials.
Vendor ResponseSkype has issued an update to correct this vulnerability. More details can be found at:
2009-07-14 - Vulnerability reported to vendor
2010-03-11 - Coordinated public release of advisory
CreditThis vulnerability was discovered by: