Hello, this is Eric Maurice.
Today Oracle released Security Alert CVE-2013-1493 to address two vulnerabilities affecting Java running in web browsers (CVE-2013-1493 and CVE-2013-0809). One of these vulnerabilities (CVE-2013-1493) has recently been reported as being actively exploited by attackers to maliciously install the McRat executable onto unsuspecting users’ machines. Both vulnerabilities affect the 2D component of Java SE. These vulnerabilities are not applicable to Java running on servers, standalone Java desktop applications or embedded Java applications. They also do not affect Oracle server-based software. These vulnerabilities have each received a CVSS Base Score of 10.0.
Though reports of active exploitation of vulnerability CVE-2013-1493 were recently received, this bug was originally reported to Oracle on February 1st 2013, unfortunately too late to be included in the February 19th release of the Critical Patch Update for Java SE.
The company intended to include a fix for CVE-2013-1493 in the April 16, 2013 Critical Patch Update for Java SE (note that Oracle recently announced its intent to have an additional Java SE security release on this date in addition to those previously scheduled in June and October of 2013). However, in light of the reports of active exploitation of CVE-2013-1493, and in order to help maintain the security posture of all Java SE users, Oracle decided to release a fix for this vulnerability and another closely related bug as soon as possible through this Security Alert.
As always, Oracle recommends that this Security Alert be applied as soon as possible. Desktop users can install this new version from java.com or through the Java autoupdate. Desktop users should also be aware that Oracle has recently switched Java security settings to “high” by default. This high security setting results in requiring users to expressly authorize the execution of applets which are either unsigned or are self-signed. As a result, unsuspecting users visiting malicious web sites will be notified before an applet is run and will gain the ability to deny the execution of the potentially malicious applet. In order to protect themselves, desktop users should only allow the execution of applets when they expect such applets and trust their origin.
As stated in previous blogs, Oracle is committed to accelerating the release of security fixes for Java SE, particularly to help address the security-worthiness of Java running in browsers. The quick release of this Security Alert, the higher number of Java SE fixes included in recent Critical Patch Updates, and the announcement of an additional security release date for Java SE (the April 16th Critical Patch Update for Java SE) are examples of this commitment.
For more information:
The Advisory for Security Alert CVE-2013-1493 can be found at http://www.oracle.com/technetwork/topics/security/alert-cve-2013-1493-1915081.html
More information about Oracle Software Security Assurance can be found at http://www.oracle.com/us/support/assurance/index.html.