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Adobe/Macromedia Flash Player Code Execution (Action Script)
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SUMMARY
Adobe/Macromedia Flash Player is "the world's most ubiquitous Browser
plug-in for Microsoft, Mozilla and Apple technologies. The plug-in claims
to facilitate high-impact web interfaces and interactive online
advertising for circa 98% of desktops globally".
Unfortunately, it transpires that Adobe Flash Player is prone to a remote
arbitrary code execution vulnerability, that allows an attacker to gain
control of a target system through the simple invocation of a maliciously
constructed web page.
DETAILS
Vulnerable Systems:
* Adobe Flash Player 8.0.24.0 and earlier versions
* Adobe Flash Professional 8, Flash Basic
* Adobe Flash MX 2004
* Adobe Flex 1.5
CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-3311>
CVE-2006-3311
The vulnerability originates out of Flash's failure to sufficiently handle
large dynamically generated strings at run time. As a result, it is
possible (using rudimentary Action Script) to create a .swf movie in such
a way that when processed by the Plug-in, will overwrite system memory at
an explicit location.
More specifically, the aforementioned location can (with a certain degree
of accuracy) be attacker controlled via the direct manipulation of the
overall length of the generated string.
The net result is that of a partially controllable condition, which opens
the door to a multitude of differing exploitation vectors, including but
not limited to heap/stack overwrites, and/or 3rd party race conditions.
Vendor response:
The vendor security bulletin and corresponding patches are available at
the following location: <http://www.adobe.com/go/apsb06-11/>
http://www.adobe.com/go/apsb06-11/
Disclosure Timeline:
12/05/2006 - Preliminary Vendor notification.
18/05/2006 - Vulnerability confirmed in pre-release Flash 9, and earlier
versions
28/06/2006 - Flash Player 9 released (Fixed)
31/07/2006 - Public Disclosure deferred by Vendor.
12/09/2006 - Coordinated public release.
Total Time to Fix: 4 months (123 days)
ADDITIONAL INFORMATION
The information has been provided by Stuart Pearson.
The original article can be found at:
<http://www.computerterrorism.com/research/ct12-09-2006.htm>
http://www.computerterrorism.com/research/ct12-09-2006.htm
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