ZDI-11-217: Adobe Shockwave Font Structure Parsing Remote Code Execution Vulnerability

ZDI-11-217: Adobe Shockwave Font Structure Parsing Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-217

June 14, 2011

– CVE ID:
CVE-2011-2109

– CVSS:
7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)

– Affected Vendors:
Adobe

– Affected Products:
Adobe Shockwave Player

– TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11371.
For further product information on the TippingPoint IPS, visit:

http://www.tippingpoint.com

– 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 Font Asset.x32 module responsible
for parsing font-related structures within Director movies (.dir). The
code within this module extracts and copies strings without any bounds
checking. Several calls to strcpy can be abused to overwrite stack
buffers and subsequently execute remote 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:

http://www.adobe.com/support/security/bulletins/apsb11-17.html

– Disclosure Timeline:
2011-04-01 - Vulnerability reported to vendor
2011-06-14 - Coordinated public release of advisory

– Credit:
This vulnerability was discovered by:
* Sebastian Apelt (www.siberas.de)

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