ZDI-11-204: Adobe Shockwave TextXtra Text Element Parsing Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-204

June 14, 2011

-- CVE ID:
CVE-2011-2112

-- CVSS:
9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)

-- 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 11297. 
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 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:
This vulnerability was discovered by:
    * Luigi Auriemma

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