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iDefense Security Advisory 06.14.11: Adobe Shockwave 3D Asset DEMX Integer Overflow Vulnerability
Jun 16 2011 05:13PM
labs-no-reply (labs-no-reply ivcp vrsn com)
iDefense Security Advisory 06.14.11
Jun 14, 2011
Adobe Shockwave Player is a popular Web browser plug-in. It is available
for multiple Web browsers and platforms, including Windows, and MacOS.
Shockwave Player enables Web browsers to display rich multimedia content
in the form of Shockwave videos. For more information, see the vendor's
site found at the following link:
Remote exploitation of an integer overflow vulnerability in Adobe
Systems Inc.'s Shockwave could allow an attacker to execute arbitrary
code with the privileges of the current user.
This vulnerability occurs when Shockwave processes a maliciously
constructed "DEMX" chunk. This occurs when parsing a certain subrecord
located inside the DEMX chunk. Specifically, a 32-bit value from the
file is used in an arithmetic operation that calculates the number of
bytes to allocate for a heap buffer. This calculation can overflow,
which leads to an undersized buffer allocation. Subsequently, this
buffer is overflowed with data from the file. This can lead to the
execution of arbitrary code.
Exploitation of this vulnerability results in the execution of arbitrary
code with the privileges of the user viewing the Web page. To exploit
this vulnerability, a targeted user must load a malicious Web page
created by an attacker. An attacker typically accomplishes this via
social engineering or injecting content into compromised, trusted sites.
After the user visits the malicious Web page, no further user
interaction is needed.
Shockwave Player version 188.8.131.520 and prior are vulnerable.
iDefense is currently unaware of any workarounds for this issue.
VI. VENDOR RESPONSE
Adobe has addressed this issue with an update. Further details and
patches can be found at the following URL.
VII. CVE INFORMATION
The Common Vulnerabilities and Exposures (CVE) project has assigned the
name CVE-2011-2123 to this issue. This is a candidate for inclusion in
the CVE list (http://cve.mitre.org/), which standardizes names for
VIII. DISCLOSURE TIMELINE
05/11/2011 Initial Vendor Notification
05/11/2011 Initial Vendor Reply
06/14/2011 Coordinated Public Disclosure
This vulnerability was reported to iDefense by Luigi Auriemma.
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X. LEGAL NOTICES
Copyright Â© 2011 Verisign
Permission is granted for the redistribution of this alert
electronically. It may not be edited in any way without the express
written consent of iDefense. If you wish to reprint the whole or any
part of this alert in any other medium other than electronically, please
e-mail customerservice (at) idefense (dot) com [email concealed] for permission.
Disclaimer: The information in the advisory is believed to be accurate
at the time of publishing based on currently available information. Use
of the information constitutes acceptance for use in an AS IS condition.
There are no warranties with regard to this information. Neither the
author nor the publisher accepts any liability for any direct, indirect,
or consequential loss or damage arising from use of, or reliance on,
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