RealNetworks RealPlayer Cross-Zone Scripting Remote Code Execution Vulnerability

December 10th, 2010
ZDI-10-275 ZDI-CAN-771

CVE ID

CVE-2010-4396

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 requires in that a target must navigate to a malicious page.

The specific flaw exists within the HandleAction method of the RealPlayer ActiveX control with CLSID FDC7A535-4070-4B92-A0EA-D9994BCC0DC5. The vulnerable action that can be invoked via this control is NavigateToURL. If NavigateToURL can be pointed to a controlled file on the user's system, RealPlayer can be made to execute scripts in the Local Zone. To accomplish this, a malicious attacker can force a download of a skin file to a predictable location and then point NavigateToURL at it thus achieving remote code execution under the context of the user running RealPlayer.

Additional Details

RealNetworks has issued an update to correct this vulnerability. More details can be found at:
http://service.real.com/realplayer/security/12102010_player/en/

Disclosure Timeline

  • 2010-05-12 - Vulnerability reported to vendor
  • 2010-12-10 - Coordinated public release of advisory

Credit

Anonymous

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