Advisory Details

April 5th, 2010

Sun Java Runtime RMIConnectionImpl Privileged Context Remote Code Execution Vulnerability

ZDI-10-051
ZDI-CAN-588

CVE ID CVE-2010-0094
CVSS SCORE 10.0, (AV:N/AC:L/Au:N/C:C/I:C/A:C)
AFFECTED VENDORS Sun Microsystems
AFFECTED PRODUCTS Java Runtime
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 9591. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
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:
http://www.oracle.com/technology/deploy/security/critical-patch-updates/javacpumar2010.html
DISCLOSURE TIMELINE
  • 2009-10-21 - Vulnerability reported to vendor
  • 2010-04-05 - Coordinated public release of advisory
CREDIT Sami Koivu
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