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RealNetworks RealPlayer/HelixPlayer RealPix Format String
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SUMMARY
<http://www.real.com/> RealPlayer is "an application for playing various
media formats, developed by RealNetworks Inc".
Remote exploitation of a format string vulnerability in RealPix (.rp) file
format parser within various versions of RealNetworks Inc.'s RealPlayer
could allow attackers to execute arbitrary code.
DETAILS
Vulnerable Systems:
* Linux RealPlayer 10 versions 10.0.0 to 10.0.5
* Helix Player versions 10.0.0 to 10.0.5
The vulnerability specifically exists because of the improper usage of a
formatted printing function. When a user specifies an invalid value for
the "timeformat" attribute describing a RealPix file, the data is passed
to the function.
The following stripped down .rp file is sufficient enough to trigger the
vulnerability:
<imfl>
<head
title="iDEFENSE Labs RealPix Vulnerability"
timeformat="%n%n%n%n%n%n"/>
</imfl>
Exploitation allows for arbitrary code execution as the user who opened
the .rp file.
Exploitation requires an attacker to craft a malicious .rp file and
convince a user to open it. An attacker could also trick a user to load
the .rp file from a normal web page under the attacker's control; this is
possible if the user has configured their web browser to handle RealPlayer
formats automatically.
Workaround:
Filter .rp attachments at e-mail gateways. Educate users about the risks
of accepting files from untrusted individuals.
Vendor Status:
The vendor had released the following advisory for this vulnerability:
<http://service.real.com/help/faq/security/050930_player/EN/>
http://service.real.com/help/faq/security/050930_player/EN/
CVE Information:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2710>
CAN-2005-2710
Disclosure Timeline:
* 23.08.05 - Initial vendor notification
* 02.09.05 - Initial vendor response
* 30.09.05 - Coordinated public disclosure
ADDITIONAL INFORMATION
The information has been provided by iDEFENSE.
The original article can be found at:
<http://www.idefense.com/application/poi/display?id=311&type=vulnerabilities> http://www.idefense.com/application/poi/display?id=311&type=vulnerabilities
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