Oracle has issued a rare out-of-band security patch for Java to fix a flaw that posed a risk to anyone installing the tool on Windows devices.
Oracle released information on the Security Alert CVE-2016-0603 on Friday, explaining that it fixes a vulnerability in Java 6, 7 and 8 when installed on the Windows platform.
"To be successfully exploited, this vulnerability requires that an unsuspecting user be tricked into visiting a malicious web site and download files into the user's system before installing Java SE 6, 7 or 8," Oracle explained.
"Though relatively complex to exploit, this vulnerability may result, if successfully exploited, in a complete compromise of the unsuspecting user’s system."
The flaw has received a CVSS Base Score of 7.6, which translates as High.
Oracle explained that customers with Java already installed are not at risk but that anyone installing the software should use the official website to avoid the risk of infection.
"As a reminder, Oracle recommends that Java home users visit Java.com to ensure that they are running the most recent version of Java SE and that all older versions have been completely removed," the firm said.
Qualys CTO Wolfgang Kandek urged anyone installing Java in the coming days to be aware of the Oracle fix.
"As Oracle points out, existing installations are not at risk. New installations should use the latest fixed packages published by Oracle," he said.
"This would address the situation where an end-user might have visited a malicious site which could have prepared the machine for an attack by downloading altered versions of one of the DLLs [dynamic link libraries] involved."
The fix comes around two weeks after Oracle issued its standard quarterly security update that contained 248 fixes.
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