ZDI-11-114: RealNetworks Helix Server x-wap-profile Format String Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-11-114

April 1, 2011

-- CVE ID:
CVE-2010-4235

-- CVSS:
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)

-- Affected Vendors:
RealNetworks

-- Affected Products:
RealNetworks Helix Server

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 10863. 
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Helix Server products. Authentication is not
required to exploit this vulnerability.

The specific flaw exists within the rmserver.exe process. This process
is active by default on all Helix Server installations. Due to a failure
to properly sanitize the contents of the 'x-wap-profile' header, it is
possible to provide malicious data that is passed directly to a format
string function. Remote attackers could leverage this vulnerability to
execute arbitrary code under the context of the SYSTEM user.

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

http://www.realnetworks.com/helix-support/security-updates.aspx

-- Disclosure Timeline:
2010-10-02 - Vulnerability reported to vendor
2011-04-01 - Coordinated public release of advisory

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

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