ZDI-10-005: RealNetworks RealPlayer ASMRulebook Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-005 
January 21, 2010

-- CVE ID:
CVE-2009-4241

-- Affected Vendors:
RealNetworks

-- Affected Products:
RealNetworks RealPlayer

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 5783. 
For further product information on the TippingPoint IPS, visit:

http://www.tippingpoint.com 

-- Vulnerability Details:
This vulnerability allows remote attackers to execute code on vulnerable
installations of RealPlayer. User interaction is required in that a user
must open a malicious file or visit a malicious web site.

The specific flaw exists during the parsing of files with improperly
defined ASMRuleBook structures. A controllable memory allocation allows
for an attacker to corrupt heap  memory. Attacker controlled data from
the corrupt heap is later used as an object pointer which can be
leveraged to execute arbitrary code in the context of the currently
logged in user.

-- Vendor Response:
RealNetworks has issued an update to correct this vulnerability. More
details can be found at:

http://service.real.com/realplayer/security/01192010_player/en/ 

-- Disclosure Timeline:
2007-11-07 - Vulnerability reported to vendor
2010-01-21 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Anonymous

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