Advisory Details

June 14th, 2011

Adobe Shockwave TextXtra Text Element Parsing Remote Code Execution Vulnerability

ZDI-11-204
ZDI-CAN-1119

CVE ID CVE-2011-2112
CVSS SCORE 9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)
AFFECTED VENDORS Adobe
AFFECTED PRODUCTS Shockwave Player
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 11297. 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 TextXtra.x32 module responsible for parsing text elements within RIFF-based Director files. The code within this module trusts various length and count values present in the file. By crafting certain values an attacker can wrap arithmetic operations and subsequently under-allocate a heap buffer. This can be leveraged 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/apsb11-17.html
DISCLOSURE TIMELINE
  • 2011-04-01 - Vulnerability reported to vendor
  • 2011-06-14 - Coordinated public release of advisory
CREDIT Luigi Auriemma
BACK TO ADVISORIES