A dialog box presented by Java when it encounters an application that isn’t signed by a digital certificate. Java.com Oracle plans to release an update for the widely exploited Java browser plugin. The update fixes 39 critical vulnerabilities and introduces changes designed to make it harder to carry out drive-by attacks on end-user computers. The update scheduled for Tuesday comes as the security of Java is reaching near-crisis levels. Throughout the past year, a series of attacks hosted on popular websites has been used to surreptitiously install malware on unwitting users’ machines. The security flaws have been used to infect employees of Facebook and Apple in targeted attacks intended to penetrate those companies. The vulnerabilities have also been exploited to hijack computers of home and business users. More than once, attackers have exploited one previously undocumented bug within days or weeks of patching a previous “zero-day,” as such vulnerabilities are known, creating a string of attacks on the latest version of the widely used plugin. In all, Java 7 Update 21 will fix at least 42 security bugs, Oracle said in a pre-release announcement . The post went on to say that “39 of those vulnerabilities may be remotely exploitable without authentication, i.e., may be exploited over a network without the need for a username and password.” The advisory didn’t specify or describe the holes that will be patched. Security Exploration, a Poland-based security company that has discovered dozens of “security issues” in Java, has a running list of them here . Read 5 remaining paragraphs | Comments

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New security protection, fixes for 39 exploitable bugs coming to Java