Skype file: URI Handling Security Bypass Arbitrary Code Execution (uncredentialed check)

This script is Copyright (C) 2008-2014 Tenable Network Security, Inc.


Synopsis :

The remote Skype client is affected by a security policy bypass
vulnerability.

Description :

The version of Skype installed on the remote host reportedly uses
improper logic in its 'file:' URI handler when validating URLs by
failing to check for certain dangerous file extensions and checking
for others in a case-sensitive manner.

If an attacker can trick a user on the affected host into clicking on
a specially crafted 'file:' URI, this issue could be leveraged to
execute arbitrary code on the affected system subject to the user's
privileges.

Note this only affects Skype for Windows.

See also :

http://www.nessus.org/u?9341c10a
http://www.securityfocus.com/archive/1/493081/30/0/threaded
http://www.skype.com/security/skype-sb-2008-003.html

Solution :

Upgrade to Skype version 3.8.0.139 or later.

Risk factor :

High / CVSS Base Score : 9.3
(CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 7.7
(CVSS2#E:F/RL:OF/RC:C)
Public Exploit Available : true

Family: Windows

Nessus Plugin ID: 33125 ()

Bugtraq ID: 29553

CVE ID: CVE-2008-1805
CVE-2008-2545

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