ZDI-10-266: RealNetworks RealPlayer Multi-Rate Audio Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-266

December 10, 2010

-- CVE ID:
CVE-2010-4375

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

-- 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 8441.
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- Vulnerability Details:
This vulnerability allows 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 specific flaw exists when parsing a RealMedia file containing a
malformed multi-rate audio stream. The application explicitly trusts two
16-bit values in this data structure which are then used to calculate
the size used for an allocation. When data is written to this allocated
buffer, an overflow will occur which can lead to code execution under
the context of the current user.

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

http://service.real.com/realplayer/security/12102010_player/en/

-- Disclosure Timeline:
2009-04-15 - Vulnerability reported to vendor
2010-12-10 - Coordinated public release of advisory

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

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