Exploit:Java/Majava.B

Classification

Malware

Exploit

Java

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Summary

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

Security programs use generic detections that look for broad patterns of code or behavior to identify similar programs or files. If you suspect the file was incorrectly detected, go to: Removal: Suspect a file is incorrectly detected (a False Positive)?.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Exploit 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.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

Find out more

Knowledge Base

Find the latest advice in our Community Knowledge Base.

User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

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: