CERT released Vulnerability Note VU#625617 to address a vulnerability in Oracle Java Runtime Environment (JRE) 7 and earlier that is currently being exploited in the wild. This vulnerability may allow an attacker to execute arbitrary code on vulnerable systems.
US-CERT encourages users and administrators to review CERT Vulnerability Note VU#625617 and US-CERT Alert TA13-010A. Due to the number and severity of this and prior Java vulnerabilities, it is recommended that Java be disabled temporarily in web browsers as described in the “Solution” section of the US-CERT Alert and in the Oracle Technical Note “Setting the Security Level of the Java Client.”