RealNetworks RealPlayer VIDOBJ_START_CODE Remote Code Execution Vulnerability

March 22nd, 2012
ZDI-12-048 ZDI-CAN-1368

CVE ID

CVE-2012-0924

CVSS Score

9.0 AV:N/AC:L/Au:N/C:P/I:P/A:C

Affected Vendors

RealNetworks

Affected Products

RealPlayer

Vulnerability Details


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of RealNetworks RealPlayer. User interaction is required in that a target must visit a malicious page or open a malicious file.

The flaw exists within dmp4.dll, specifically the decoding of an MPEG stream. When encountering a VIDOBJ_START_CODE object the process inproperly validates the size of the destination buffer used for rendering. The contents of a decoded frame are copied to this region which can result in heap corruption if the decoded frame size exceeds the size of this region. A remote attacker can exploit this vulnerability to execute arbitrary code under the context of the process.

Additional Details

RealNetworks has issued an update to correct this vulnerability. More details can be found at:
http://service.real.com/realplayer/security/02062012_player/en/

Disclosure Timeline

  • 2011-10-21 - Vulnerability reported to vendor
  • 2012-03-22 - Coordinated public release of advisory

Credit

Luigi Auriemma

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