TippingPoint Zero Day Initiative

Adobe Flash Player AVM2 getouterscope Opcode Remote Code Execution Vulnerability

ZDI-10-114: June 25th, 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 8499. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows attackers to execute arbitrary code on vulnerable installations of Adobe Flash Player. User interaction is required in that a target must visit a malicious web page.

The specific vulnerability exists within the parsing of an undocumented opcode within Adobe's ActionScript Virtual Machine 2 bytecode. The operand to this opcode is used as an offset to a structure and if set to a malicious value can be pointed to attacker controlled data. The structure contains a function pointer that is later called. If an attacker modifies the controlled data pointed to by the invalid offset, this function pointer can be set to point to malicious code thus gaining execution under the context of the user running the browser.

Vendor Response

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

Disclosure Timeline

    2009-06-26 - Vulnerability reported to vendor
    2010-06-25 - Coordinated public release of advisory


This vulnerability was discovered by:
    Dionysus Blazakis