ZDI-10-051: Sun Java Runtime RMIConnectionImpl Privileged Context Remote Code Execution Vulnerability

Type securityvulns
Reporter Securityvulns
Modified 2010-04-06T00:00:00


ZDI-10-051: Sun Java Runtime RMIConnectionImpl Privileged Context Remote Code Execution Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-10-051 April 5, 2010

-- CVE ID: CVE-2010-0094

-- Affected Vendors: Sun Microsystems

-- Affected Products: Sun Microsystems Java Runtime

-- TippingPoint(TM) IPS Customer Protection: TippingPoint IPS customers have been protected against this vulnerability by Digital Vaccine protection filter ID 9591. 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 Sun Java Runtime Environment. User interaction is required to exploit this vulnerability in that the target must visit a malicious website.

The specific flaw exists within the deserialization of RMIConnectionImpl objects. Due to a lack of privilege checks during deserialization it is possible to supply privileged code in the ClassLoader of a constructor being deserialized. This allows for a remote attacker to call system level Java functions without proper sandboxing. Exploitation of this can lead to remote system compromise under the context of the currently logged in user.

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


-- Disclosure Timeline: 2009-10-21 - Vulnerability reported to vendor 2010-04-05 - Coordinated public release of advisory

-- Credit: This vulnerability was discovered by: * Sami Koivu

-- 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: