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ZDI-12-021 : Adobe Reader BMP Resource Signedness Remote Code
Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-021
February  8, 2012

- -- CVE ID:
CVE-2011-4373

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

- -- Affected Vendors:

Adobe



- -- Affected Products:

Adobe Reader



- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 12017.
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 Adobe Reader X. 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 2d.x3d, which is Adobe Reader's code
responsible for processing BMP files. When passing a negative size
parameter in the 'colors' field, a series of signed comparisons will be
averted, and the overly large size parameter is passed to a memcpy().
This will cause a heap-based buffer overflow, allowing an attacker to
execute code under the context of the user.

- -- Vendor Response:

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

http://www.adobe.com/support/security/bulletins/apsb12-01.html




- -- Disclosure Timeline:
2011-10-28 - Vulnerability reported to vendor

2012-02-08 - Coordinated public release of advisory



- -- Credit:
This vulnerability was discovered by:

* Alin Rad Pop



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