CVE-2013-0422

Multiple vulnerabilities in Oracle Java 7 before Update 11 allow remote
attackers to execute arbitrary code by (1) using the public
getMBeanInstantiator method in the JmxMBeanServer class to obtain a
reference to a private MBeanInstantiator object, then retrieving arbitrary
Class references using the findClass method, and (2) using the Reflection
API with recursion in a way that bypasses a security check by the
java.lang.invoke.MethodHandles.Lookup.checkSecurityManager method due to
the inability of the sun.reflect.Reflection.getCallerClass method to skip
frames related to the new reflection API, as exploited in the wild in
January 2013, as demonstrated by Blackhole and Nuclear Pack, and a
different vulnerability than CVE-2012-4681 and CVE-2012-3174. NOTE: some
parties have mapped the recursive Reflection API issue to CVE-2012-3174,
but CVE-2012-3174 is for a different vulnerability whose details are not
public as of 20130114. CVE-2013-0422 covers both the JMX/MBean and
Reflection API issues. NOTE: it was originally reported that Java 6 was
also vulnerable, but the reporter has retracted this claim, stating that
Java 6 is not exploitable because the relevant code is called in a way that
does not bypass security checks. NOTE: as of 20130114, a reliable third
party has claimed that the findClass/MBeanInstantiator vector was not fixed
in Oracle Java 7 Update 11. If there is still a vulnerable condition, then
a separate CVE identifier might be created for the unfixed issue.

Bugs

• <https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2013-0422&gt;

Notes