ZDI-10-273: RealNetworks RealPlayer AAC MLLT Atom Parsing Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-273

December 10, 2010

-- CVE ID:
CVE-2010-2999

-- 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 8415.
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 an .AAC file containing a
malformed MLLT atom. The application utilizes a size specified in this
data structure for allocation of a list of objects. To calculate the
size for the allocation, the application will multiply this length by 8.
If the multiplication results in a value greater than 32 bits an integer
overflow will occur. When copying data into this buffer heap corruption
will occur which can lead to code execution under 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/12102010_player/en/

-- Disclosure Timeline:
2009-08-20 - Vulnerability reported to vendor
2010-12-10 - Coordinated public release of advisory

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

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