Message-ID: <EE499D69B3D0714590B6FE9762B0461104BFE98F61@emb01.unity.local>
Date: Fri, 10 Dec 2010 15:27:25 -0600
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: "'Full Disclosure (full-disclosure@...ts.grok.org.uk)'"
	<full-disclosure@...ts.grok.org.uk>,
	"'Bugtraq (bugtraq@...urityfocus.com)'" <bugtraq@...urityfocus.com>
Subject: ZDI-10-275: RealNetworks RealPlayer Cross-Zone
 Scripting Remote Code Execution Vulnerability

ZDI-10-275: RealNetworks RealPlayer Cross-Zone Scripting Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-275

December 10, 2010

-- CVE ID:
CVE-2010-4396

-- CVSS:
9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)

-- Affected Vendors:
RealNetworks

-- Affected Products:
RealNetworks RealPlayer

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 10589.
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

-- 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.

-- Vendor Response:
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:
This vulnerability was discovered by:
    * Anonymous

-- 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/

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