RealNetworks RealPlayer RealAudio coded_frame_size Remote Code Execution

March 22nd, 2012
ZDI-12-049 ZDI-CAN-1359

CVE ID

CVE-2012-0927

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 cook.dll, specifically the handling of a RealAudio 2.0 file. When parsing the RA2 header a coded_frame_sz element is used to calculate the size for an allocation. This value is not properly verified before unpacking stream data into this new location. 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

Back to Advisories