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Zero Day Initiative Advisory 12-187

Zero Day Initiative Advisory 12-187
Posted Nov 19, 2012
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 12-187 - 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 how the application parses a particular array contained within a Real Media file and then uses the data. When allocating and reading frame size information, the application will fail to check the bounds of how this array is used. The application will use results in this array as an allocation for the size of a buffer. When initializing this new buffer, the application can then write outside it's bounds which will lead to code execution under the context of the application.

tags | advisory, remote, arbitrary, code execution
advisories | CVE-2012-0923
MD5 | caf9795079d80e997299543e119f22d0

Zero Day Initiative Advisory 12-187

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ZDI-12-187 : RealNetworks RealPlayer RV20 Frame Size Array Remote Code
Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-187
November 19, 2012

- -- CVE ID:
CVE-2012-0923

- -- 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 how the application parses a particular
array contained within a Real Media file and then uses the data. When
allocating and reading frame size information, the application will fail to
check the bounds of how this array is used. The application will use
results in this array as an allocation for the size of a buffer. When
initializing this new buffer, the application can then write outside it's
bounds which will lead to code execution under the context of 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/09072012_player/en/


- -- Disclosure Timeline:
2011-10-21 - Vulnerability reported to vendor
2012-11-19 - Coordinated public release of advisory

- -- Credit:
This vulnerability was discovered by:
* Luigi Auriemma

- -- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

http://www.zerodayinitiative.com/advisories/disclosure_policy/

Follow the ZDI on Twitter:
http://twitter.com/thezdi

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