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             AUSCERT External Security Bulletin Redistribution

                               ESB-2011.0201
        RealNetworks Real Player Predictable Temporary File Remote
                       Code Execution Vulnerability
                             22 February 2011

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           RealPlayer
Publisher:         Zero Day Initiative
Operating System:  UNIX variants (UNIX, Linux, OSX)
                   Windows
Impact/Access:     Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution:        Patch/Upgrade
CVE Names:         CVE-2011-0694  

Original Bulletin: 
   http://www.zerodayinitiative.com/advisories/ZDI-11-076/

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RealNetworks Real Player Predictable Temporary File Remote Code Execution 
Vulnerability
ZDI-11-076: February 8th, 2011

CVE ID

      CVE-2011-0694 

CVSS Score

      9, (AV:N/AC:L/Au:N/C:P/I:P/A:C) 

Affected Vendors

      RealNetworks

Affected Products

      RealPlayer

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on 
vulnerable installations of RealNetworks RealPlayer. User interaction is 
required to exploit this vulnerability in that the target must visit a 
malicious page or open a malicious file.

The flaw exists within the temporary file naming scheme used for storage of 
references to Real Media files. This easily predictable temporary filename can 
be brute forced and used in combination with the OpenURLinPlayerBrowser 
function available in classid:FDC7A535-4070-4B92-A0EA-D9994BCC0DC5 to execute 
the file. A remote attacker can exploit this vulnerability to execute 
arbitrary code under the context of the browser.

Vendor Response

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

      http://service.real.com/realplayer/security/02082011_player/en/

Disclosure Timeline

      2010-11-15 - Vulnerability reported to vendor
      2011-02-08 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:

      Eduardo

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