ZDI-08-021: Adobe Flash Player DeclareFunction2 Invalid Object Use- Vulnerability

From: zdi-disclosures@3com.com
To: full-disclosure@lists.grok.org.uk,bugtraq@securityfocus.com
Cc: zdi-disclosures@3com.com
Subject: ZDI-08-021: Adobe Flash Player DeclareFunction2 Invalid Object Use- Vulnerability

ZDI-08-021: Adobe Flash Player DeclareFunction2 Invalid Object Use 
April 8, 2008

-- CVE ID:

-- Affected Vendors:

-- Affected Products:
Adobe Flash Player

-- Vulnerability Details:
This vulnerability allows remote attackers to execute code on vulnerable
installations of Adobe's Flash Player. User interaction is required in
that a user must visit a malicious web site.

The specific flaw exists when the Flash player attempts to access
embedded Actionscript objects that have not been properly instantiated.
In order for exploitation to occur, an attacker would have to modify a
DeclareFunction2 Actionscript tag within an SWF file. Exploitation of
this vulnerability can result in arbitrary code execution under the
context of the currently logged in user.

-- Vendor Response:
Adobe has issued an update to correct this vulnerability. More
details can be found at:


-- Disclosure Timeline:
2008-02-07 - Vulnerability reported to vendor
2008-04-08 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Javier Vicente Vallejo
    * Shane Macaulay CanSecWest 2007 PWN2OWN Winner

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