TippingPoint Digital Vaccine Laboratories
DID YOU KNOW... In December of 2007, Microsoft released seven security bulletins which fixed 11 new security vulnerabilities. TippingPoint and ZDI were credited with discovering a total of four of those vulnerabilities.

Adobe Flash Player JPG Processing Heap Overflow Vulnerability

TPTI-07-21: December 19th, 2007


Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 5846. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on systems with vulnerable installations of the Adobe Flash Player. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists in the Flash Player's parsing of JPG images embedded in SWF files. The Flash Player trusts the signed X and Y densities specified in the JPG header and makes memory allocations accordingly. A processing loop later treats these values as unsigned, leading to excessive loop iterations and heap corruption while decoding the rest of the image.

Vendor Response

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

Disclosure Timeline

    2007-11-02 - Vulnerability reported to vendor
    2007-12-19 - Coordinated public release of advisory


This vulnerability was discovered by: