Skype skype4com URI Handler Remote Heap Corruption Vulnerability

ZDI-07-070: Skype skype4com URI Handler Remote Heap Corruption

Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-07-070.html

December  6, 2007

-- CVE ID:

CVE-2007-5989

-- Affected Vendor:

Skype

-- Affected Products:

Skype < 3.6 GOLD

-- TippingPoint(TM) IPS Customer Protection:

TippingPoint IPS customers have been protected against this

vulnerability by Digital Vaccine protection filter ID 5752.

For further product information on the TippingPoint IPS:

http://www.tippingpoint.com

-- Vulnerability Details:

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 within the 'skype4com' URI handler created by

Skype during installation. When processing short string values through

this handler an exploitable memory corruption may occur which can

result in arbitrary code execution under the context of the current

user.

-- Vendor Response:

Skype has corrected this issue as of 11/15/2007. All clients updated or

installed as of that date are patched to this issue.

-- Disclosure Timeline:

2007.11.02 - Vulnerability reported to vendor

2007.12.06 - Coordinated public release of advisory

-- Credit:

This vulnerability was discovered by an anonymous researcher.

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through the ZDI can find more information and sign-up at:

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