Exploit: ​Java/Majava.B

Summary

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Exploit:Java/Majava.B identifies malicious files that exploit vulnerabilities in the Java Runtime Environment (JRE).

Removal

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Prevention

Java exploits typically target known vulnerabilities in the Java Runtime Environment; to prevent successful exploitation, please ensure you install the latest updates available for Java and/or remove any old, unnecessary installations.

To ensure you have the recommended version of Java installed on your system, please refer to the vendor's Verify Java version page.

Disinfection

F-Secure Anti-Virus will automatically clean the relevant files.

Suspect A False Positive?

If you suspect a file has been wrongly identified by this detection (that is, it is a False Positive), you may elect to submit a sample of the file to our Labs for further analysis via:

• Submit A Sample (SAS) page

Technical Details

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Exploit:Java/Majava.B is a Generic Detection that identifies exploit files used to target and exploit vulnerabilities in the Java Runtime Environment (JRE).

If successfully used, exploits can provide an attacker with a wide range of possible actions, from viewing data on a restricted-user database to almost complete control of a compromised system.

The exploit files may be delivered by other malware, such as the Blackhole exploit kit.

For more information, please see:

• Exploit
• Labs Weblog: Java Considered Harmful
• Threat Report H1 2012 (PDF)