Advisory Details

December 7th, 2011

RealNetworks RealPlayer mp4arender esds channel count Remote Code Execution Vulnerability

ZDI-11-343
ZDI-CAN-1351

CVE ID CVE2011-4260
CVSS SCORE 7.5, (AV:N/AC:L/Au:N/C:P/I:P/A:P)
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 to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the mp4arender.dll module. If the channel count is altered inside the esds atom, the allocated buffer will be too small to support the decoded audio data, causing a heap overflow. 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
  • 2011-12-07 - Coordinated public release of advisory
CREDIT Luigi Auriemma
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