The MITRE CVE dictionary describes this issue as:
Unspecified vulnerability in Oracle Java 7 before Update 11 allows remote attackers to affect confidentiality, integrity, and availability via unknown vectors, a different vulnerability than CVE-2013-0422. NOTE: some parties have mapped CVE-2012-3174 to an issue involving recursive use of the Reflection API, but that issue is already covered as part of CVE-2013-0422. This identifier is for a different vulnerability whose details are not public as of 20130114.
Find out more about CVE-2012-3174 from the
MITRE CVE dictionary dictionary and