9.3 High
CVSS2
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
0.021 Low
EPSS
Percentile
89.1%
Security researcher Gregory Fleischer demonstrated that web content fetched via the jar: protocol can use Java via LiveConnect to open socket connections to arbitrary ports on the user’s machine (“localhost”). The issue is caused by improper parsing of the content origin passed from the browser to the Java plugin. Such content was incorrectly evaluated to have a null host, assumed to be a local file, and was subsequently allowed permission to connect to the localhost. Sun has updated the Java Runtime Environment with a fix for this problem. Mozilla has also added a fix to LiveConnect to protect users who don’t have the latest version of Java.