ZDI-10-269: RealNetworks RealPlayer AAC TIT2 Atom Integer Overflow Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-269

December 10, 2010

-- CVE ID:
CVE-2010-4397

-- 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 8279.
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
systems with vulnerable installations of the 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 in RealPlayer's pnen3260.dll module while
parsing the TIT2 atom within AAC files. The code within this module does
not account for a negative size during an allocation and later uses the
value as unsigned within a copy loop. Exploitation of this vulnerability
allows an attacker to execute arbitrary code under the context of the
user opening the AAC file.

-- 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:
2009-06-25 - Vulnerability reported to vendor
2010-12-10 - Coordinated public release of advisory

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

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