Getting NullPointerException on Remote Server

[UbaidAhmed2803]

Describe the bug I am trying to run the following command on a remote server (Digital Ocean Ubuntu Instance):

./burp-rest-api.sh --config-file=testing.json --project-file=testing3.burp

I am getting the following: Your JRE appears to be version 11.0.16 from Ubuntu Burp has not been fully tested on this platform and you may experience problems. Could not start Burp: java.lang.NullPointerException

Below is the full stack trace

webscanner@tp-web-scanner:~/burp-rest-api$ ./burp-rest-api.sh --config-file=testing.json --project-file=testing3.burp +++ dirname ./burp-rest-api.sh ++ cd . ++ pwd -P

• SCRIPTPATH=/home/webscanner/burp-rest-api ++ find /home/webscanner/burp-rest-api -name 'burp.jar' -exec sh -c 'echo {}: | tr -d '\''\n'\''' ';'
• CLASSPATH=/home/webscanner/burp-rest-api/burpsuite_pro.jar:/home/webscanner/burp-rest-api/burp-rest-api-2.2.0.jar: ++ java -version ++ fgrep version
• JAVAVER='openjdk version "11.0.16" 2022-07-19'
• JAVA17ARGS=
• [[ openjdk version "11.0.16" 2022-07-19 == \v\e\r\s\i\o\n\ \"\1\7 ]]
• java -cp /home/webscanner/burp-rest-api/burpsuite_pro.jar:/home/webscanner/burp-rest-api/burp-rest-api-2.2.0.jar: org.springframework.boot.loader.JarLauncher --config-file=testing.json --project-file=testing3.burp 2022-09-29 11:58:01.034 INFO 2968 --- [ main] c.vmware.burp.extension.BurpApplication : Starting BurpApplication on tp-web-scanner with PID 2968 (/home/webscanner/burp-rest-api/burp-rest-api-2.2.0.jar started by webscanner in /home/webscanner/burp-rest-api) 2022-09-29 11:58:01.038 INFO 2968 --- [ main] c.vmware.burp.extension.BurpApplication : No active profile set, falling back to default profiles: default 2022-09-29 11:58:02.908 INFO 2968 --- [ main] org.eclipse.jetty.util.log : Logging initialized @3727ms to org.eclipse.jetty.util.log.Slf4jLog 2022-09-29 11:58:03.005 INFO 2968 --- [ main] o.s.b.w.e.j.JettyServletWebServerFactory : Server initialized with port: 8090 2022-09-29 11:58:03.009 INFO 2968 --- [ main] org.eclipse.jetty.server.Server : jetty-9.4.27.v20200227; built: 2020-02-27T18:37:21.340Z; git: a304fd9f351f337e7c0e2a7c28878dd536149c6c; jvm 11.0.16+8-post-Ubuntu-0ubuntu120.04 2022-09-29 11:58:03.031 INFO 2968 --- [ main] o.e.j.s.h.ContextHandler.application : Initializing Spring embedded WebApplicationContext 2022-09-29 11:58:03.031 INFO 2968 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1890 ms 2022-09-29 11:58:03.067 INFO 2968 --- [ main] c.v.burp.extension.service.BurpService : # of command line arguments received to Burp suite: 2 2022-09-29 11:58:03.068 INFO 2968 --- [ main] c.v.burp.extension.service.BurpService : Launching Burp suite in headless mode... 2022-09-29 11:58:03.144 INFO 2968 --- [ main] c.v.burp.extension.service.BurpService : Launching the Burp with options: [--config-file=testing.json, --project-file=testing3.burp, --project-file=testing3.burp, --config-file=testing.json, --user-config-file=/tmp/user-options_5163491732742016456.json] Your JRE appears to be version 11.0.16 from Ubuntu Burp has not been fully tested on this platform and you may experience problems. Could not start Burp: java.lang.NullPointerException

Java version on my remote server: openjdk 11.0.16 2022-07-19 OpenJDK Runtime Environment (build 11.0.16+8-post-Ubuntu-0ubuntu120.04) OpenJDK 64-Bit Server VM (build 11.0.16+8-post-Ubuntu-0ubuntu120.04, mixed mode, sharing)

Below are the list of files present in the directory

Please help me out in resolving this issue

[phoenixml]

according to this documentation jre 11 should work with burp https://portswigger.net/burp/documentation/desktop/getting-started/launch-from-command-line but I suggest to update to the at least 17 and test it again. I hope this sort out your issue.

[ikkisoft]

Which Burp JAR have you used?

It's import to be the JAR downloaded from https://portswigger.net/burp/releases and not the JAR copied after a standard installation. With the wrong one, I am also getting:

Unrecognized command-line argument: --headless.mode
Could not start Burp: java.lang.NullPointerException