TippingPoint Zero Day Initiative
 

Mozilla Firefox Plugin Parameter EnsureCachedAttrParamArrays Remote Code Execution Vulnerability

ZDI-10-132: July 20th, 2010

CVE ID

CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10029. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla Firefox. 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 within the browser's method for parsing child elements out of a particular tag. The application will use a 32-bit index to enumerate them, but will store it in a 16-bit signed integer and then use it to allocate space for a cache. When populating the cache a buffer overflow will occur. This can lead to code execution under the context of the application.

Vendor Response

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

Disclosure Timeline

    2010-06-17 - Vulnerability reported to vendor
    2010-07-20 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    J23 (http://twitter.com/HansJ23)