CVE 2010-3548
Unspecified vulnerability in the Java Naming and Directory Interface (JNDI) component in Oracle Java SE and Java for Business 6 Update 21, 5.0 Update 25, and 1.4.2_27 allows remote attackers to affect confidentiality via unknown vectors. NOTE: the previous information was obtained from the October 2010 CPU. Oracle has not commented on claims from a reliable downstream vendor that this allows remote attackers to determine internal IP addresses or "otherwise-
See the 
CVE page on Mitre.org
for more details.
