TippingPoint Digital Vaccine Laboratories
DID YOU KNOW... At the 2007 Black Hat Briefings in Las Vegas, TippingPoint DVLabs had five speakers presenting on a variety of topics.

Adobe Shockwave PFR1 Font Chunk Parsing Remote Code Execution Vulnerability

TPTI-11-05: February 8th, 2011

CVE ID

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10825. For further product information on the TippingPoint IPS:

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of the Adobe Shockwave 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 within the code responsible for parsing font structures within Director files. While processing data within the PFR1 chunk, the process trusts a size value and compares a sign-extended counter against it within a copy loop. By providing a sufficiently large value, this flaw can be abused by a remote attacker to execute arbitrary code 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

    2011-01-24 - Vulnerability reported to vendor
    2011-02-08 - Coordinated public release of advisory

Credit

This vulnerability was discovered by: