The MITRE CVE dictionary describes this issue as:
Unspecified vulnerability in the Java Runtime Environment (JRE) component in Oracle Java SE 7 Update 17 and earlier, and OpenJDK 6 and 7, allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors related to HotSpot. NOTE: the previous information is from the April 2013 CPU. Oracle has not commented on claims from another vendor that this issue is related to bypassing the Java sandbox using "method handle intrinsic frames."
Find out more about CVE-2013-2431 from the
MITRE CVE dictionary dictionary and