ZDI-11-084: Oracle Java Unsigned Applet Applet2ClassLoader Remote Code Execution Vulnerability

Type securityvulns
Reporter Securityvulns
Modified 2011-02-17T00:00:00


ZDI-11-084: Oracle Java Unsigned Applet Applet2ClassLoader Remote Code Execution Vulnerability


February 15, 2011

-- CVE ID: CVE-2010-4452

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

-- Affected Vendors: Oracle

-- Affected Products: Oracle Java Runtime

-- TippingPoint(TM) IPS Customer Protection: TippingPoint IPS customers have been protected against this vulnerability by Digital Vaccine protection filter ID 10594. For further product information on the TippingPoint IPS, visit:


-- Vulnerability Details: This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of the Java Runtime Environment. 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 findClass method of the sun.plugin2.applet.Applet2ClassLoader class. Due to a failure to properly validate URLs supplied by an implicitly trusted applet, it is possible to execute arbitrary code on Windows 32-bit and 64-bit, as well as Linux 32-bit platforms under the context of the SYSTEM user.

-- Vendor Response: Oracle has issued an update to correct this vulnerability. More details can be found at:


-- Disclosure Timeline: 2010-09-28 - Vulnerability reported to vendor 2011-02-15 - Coordinated public release of advisory

-- Credit: This vulnerability was discovered by: * Frederic Hoguin

-- 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:


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:


Follow the ZDI on Twitter: