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ZDI-12-087 : RealNetworks RealPlayer raac.dll stsz Remote Code Execution
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-087
June  6, 2012

- -- CVE ID:

CVE-2011-4260

- -- CVSS:

7.5, AV:N/AC:L/Au:N/C:P/I:P/A:P

- -- Affected Vendors:

RealNetworks

- -- Affected Products:

RealNetworks 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 specific flaw exists within the raac.dll module. By editing the stsz
atom in the mp4 file data, an attacker could change a sample size to force
a loop in raac.dll to loop too many times, causing heap corruption. This
vulnerability can be leveraged to execute code under the context of the
user running the application.

- -- Vendor Response:

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

http://service.real.com/realplayer/security/11182011_player/en/

- -- Disclosure Timeline:

2011-08-28 - Vulnerability reported to vendor
2012-06-06 - Coordinated public release of advisory

- -- Credit:

This vulnerability was discovered by:

* Luigi Auriemma

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