ZDI-11-297 : Adobe Reader U3D PCX Parsing Remote Code Execution
Vulnerability
https://www.zerodayinitiative.com/advisories/ZDI-11-297
October 26, 2011

-- CVE ID:
CVE-2011-2437

-- CVSS:
7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P

-- Affected Vendors:

Adobe



-- Affected Products:

Adobe Reader



-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of 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 within the Adobe Image parsing library. When
Adobe Reader tries to parse an .PCX image it creates a 32 bits loop
counter based on the height and width of the image. It then enters a
loop to copy data from the file in to a memory buffer, but the loop
counter used in that function is only a 16 bit integer and as such can
never reach the end of the loop when the max loop counter is bigger then
0xFFFF. Exploitation of this issue allows for remote code execution
under the context of the user running the application.

-- Vendor Response:

Adobe has issued an update to correct this vulnerability. More details
can be found at:

https://www.adobe.com/support/security/bulletins/apsb11-24.html



-- Disclosure Timeline:
2011-05-12 - Vulnerability reported to vendor
2011-10-26 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:

* binaryproof



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