Advisory Details

August 24th, 2010

Adobe Shockwave Player Director File FFFFFF88 Record Processing Remote Code Execution Vulnerability

ZDI-10-164
ZDI-CAN-864

CVE ID CVE-2010-2876
CVSS SCORE 9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)
AFFECTED VENDORS Adobe
AFFECTED PRODUCTS Shockwave Player
TIPPINGPOINT™ IPS CUSTOMER PROTECTION TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 10285. For further product information on the TippingPoint IPS: 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 code responsible for parsing .dir and .dcr files. The director file format is RIFF based. While parsing an undocumented record of type 0xFFFFFFF8 the process trusts two user supplied word values when performing arithmetic to calculate a heap buffer size. By specifying large enough values an integer wrap can occur. The allocated heap buffer can later be overflowed with user supplied data. This can be leveraged by attackers to 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/apsb10-20.html
DISCLOSURE TIMELINE
  • 2010-07-20 - Vulnerability reported to vendor
  • 2010-08-24 - Coordinated public release of advisory
CREDIT Anonymous
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