A patch for a critical Java flaw released by Oracle in 2013 is ineffective and can be easily bypassed, security researchers warn. This makes the vulnerability exploitable again, paving the way for attacks against PCs and servers running the latest versions of Java.
The flaw, tracked as CVE-2013-5838 in the Common Vulnerabilities and Exposures (CVE) database, was rated by Oracle 9.3 out of 10 using the Common Vulnerability Scoring System (CVSS). It can be exploited remotely, without authentication, to completely compromise a system's confidentiality, integrity and availability.