[Full-disclosure] RealNetworks RealPlayer IVR File Processing Multiple Code Execute Vulnerabilities

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RealNetworks RealPlayer IVR File Processing Multiple Code Execute 
Vulnerabilities
2009.February.05 

Fortinet's FortiGuard Global Security Research Team Discovers Two 
Vulnerabilities in RealNetworks RealPlayer.

Summary:
========

Two code execute vulnerabilities exist in RealNetworks RealPlayer 11 through 
malformed IVR files. 

Impact:
=======

Remote Code Execution.

Risk:
=====

Critical

Affected Software:
==================

RealNetworks RealPlayer 11

Additional Information:
=======================

Internet Video Recording (IVR) files contain media content that is played and 
recorded by RealPlayer. A remote attacker could craft a malicious IVR file, 
that when sent to an unsuspecting user, may allow the execution of arbitrary 
code when viewed, using one of two vulnerabilities during RealPlayer's IVR 
processing routine:

    * A heap corruption vulnerability that occurs when altering a field that 
determines the length of a structure
    * A vulnerability that allows an attacker to write one null byte to an 
arbitrary memory address by using an overly long file name length value

It should be noted that the victim does not necessarily have to open the 
malicious file for exploitation to occur: the vulnerabilities lie in a DLL that 
is also used as a plugin for the Windows Explorer shell. A successful attack 
could take place by merely previewing the IVR file through Windows Explorer.

Solutions:
==========

The FortiGuard Global Security Research Team released the signature 
"RealNetworks.RealPlayer.IVR.File.Processing.Code.Execution"

Fortinet customers who subscribe to Fortinet’s intrusion prevention (IPS) 
service should be protected against these code execute vulnerabilities. 
Fortinet’s IPS service is one component of FortiGuard Subscription Services, 
which also offer comprehensive solutions such as antivirus, Web content 
filtering and antispam capabilities. These services enable protection against 
threats on both application and network layers. FortiGuard Services are 
continuously updated by the FortiGuard Global Security Research Team, which 
enables Fortinet to deliver a combination of multi-layered security 
intelligence and true zero-day protection from new and emerging threats. These 
updates are delivered to all FortiGate, FortiMail and FortiClient products. 
Fortinet strictly follows responsible disclosure guidelines to ensure optimum 
protection during a threat's lifecycle.

Acknowledgement:
================

Haifei Li of Fortinet's FortiGuard Global Security Research Team

References:
===========

FortiGuard Advisory
http://www.fortiguardcenter.com/advisory/FGA-2009-04.html

CVE ID: CVE-2009-0375 (one byte rewrite)
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0375

CVE ID: CVE-2009-0376 (heap corruption)
http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0376

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