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Zero Day Initiative Advisory 12-021

Zero Day Initiative Advisory 12-021
Posted Feb 8, 2012
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 12-021 - 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.

tags | advisory, remote, overflow, arbitrary
advisories | CVE-2011-4373
SHA-256 | 24f0d26f31e6c8fcf24c50cab38a6f9c749dcbe2a5ff797f47cc95f3469fc940

Zero Day Initiative Advisory 12-021

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Hash: SHA1

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



- -- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

http://www.zerodayinitiative.com/advisories/disclosure_policy/

Follow the ZDI on Twitter:

http://twitter.com/thezdi
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