The Java Network Launching Protocol (JNLP) implementation in IcedTea6 1.9.x before 1.9.9 and before 1.8.9, and IcedTea-Web 1.1.x before 1.1.1 and before 1.0.4, allows remote attackers to obtain the username and full path of the home and cache directories by accessing properties of the ClassLoader.
icedtea.classpath.org/hg/release/icedtea-web-1.0/rev/b29fdd0f4d04
icedtea.classpath.org/hg/release/icedtea-web-1.1/rev/c7ce6c0e6227
mail.openjdk.java.net/pipermail/distro-pkg-dev/2011-July/015170.html
mail.openjdk.java.net/pipermail/distro-pkg-dev/2011-July/015171.html
rhn.redhat.com/errata/RHSA-2011-1100.html
securitytracker.com/id?1025854
ubuntu.com/usn/usn-1178-1
bugzilla.redhat.com/show_bug.cgi?id=718164