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log4shell-hotfix-side-effect — Test case to check if the Log4Shell/CVE-2021-44228 hotfix will raise any unexpected exceptions | Kitploit
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log4shell-hotfix-side-effect

Test case to check if the Log4Shell/CVE-2021-44228 hotfix will raise any unexpected exceptions

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314 years agoNot yet reviewed

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Log4Shell Hotfix Side Effect Test Case

I wanted to know if any ClassNotFoundException or similar unexpected exception is raised when one applies the CVE-2021-44228 aka Log4Shell hotfix as recommended here.

Result: It looks like no exception is bubbling up.

To test this execute the following commands:

root@kitploit:~
./gradlew clean installDist
env JAVA_OPTS=-Xmx64M ./build/install/log4shell-hotfix-side-effect/bin/log4shell-hotfix-side-effect

It will log a bunch of messages and timings and there should be no exceptions.

If the log4j jar file is not patched properly there should be a measurable delay between the messages (or you might even get an RCE, YMMV).

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