Adobe Reader Compact Font Format Malformed Index Memory Corruption VulnerabilityZDI-09-073: October 13th, 2009
TippingPoint™ IPS Customer ProtectionTippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 8658. For further product information on the TippingPoint IPS:
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Adobe Acrobat and Adobe Reader. 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 when the application parses a PDF file containing a malformed Compact Font Format stream. While decoding the font embedded in this stream, the application will explicitly trust a 16-bit value used to index into an array of elements. Usage of the object later will cause heap corruption which can be leveraged to achieve code execution under the context of the current user.
Vendor ResponseAdobe has issued an update to correct this vulnerability. More details can be found at:
2009-04-28 - Vulnerability reported to vendor
2009-10-13 - Coordinated public release of advisory
CreditThis vulnerability was discovered by: