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RealPlayer 'ShowPreferences' Buffer Overflow Vulnerability
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SUMMARY
A vulnerability has been discovered in the RealPlayer ActiveX component
that allows remote code execution when visiting a specially crafted
webpage or when opening a specially crafted skin file.
DETAILS
Vulnerable Systems:
* RealPlayer version 10.5 (6.0.12.1040) and prior
The RealPlayer ActiveX component exports a function called HandleAction().
This function is designed to take a method or an action, and to execute it
under a number of differing environments. This could be within a
RealPlayer skin file or a webpage which is designed to interact with
RealPlayer.
One of the 'actions' which HandleAction() will accept is
'ShowPreferences'. This method will accept two arguments, a category and
the url of it's respective webpage.
It has been discovered that passing overly long arguments to this method
will result in an unbounded concatenation of the two arguments into a
stack based buffer through an unchecked call to sprintf().
Fix Information:
RealNetworks have released an update for the ShowPreferences buffer
overflow which can be downloaded from:
<http://service.real.com/help/faq/security/040928_player/EN/>
http://service.real.com/help/faq/security/040928_player/EN/
ADDITIONAL INFORMATION
The information has been provided by <mailto:nisr@nextgenss.com>
NGSSoftware Insight Security Research.
The original article can be found at:
<http://www.ngssoftware.com/advisories/real-01full.txt>
http://www.ngssoftware.com/advisories/real-01full.txt
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