doas (“dedicated openbsd application subexecutor”)[3] is a program to execute commands as another user. The system administrator can configure it to give specified users privileges to execute specified commands. It is free and open-source under the ISC license[4] and available in Unix and Unix-like operating systems.
| Original author(s) | Ted Unangst |
|---|---|
| Developer(s) | OpenBSD Project[1] |
| Initial release | 18 October 2015[1] |
| Stable release | 1.99  [2]
/ 15 February 2024 |
| Repository | |
| Written in | C |
| Type | Security software |
| License | ISC license |
| Website | https://man.openbsd.org/doas |
doas was developed by Ted Unangst[5] for OpenBSD as a simpler and safer sudo replacement.[6][7] Unangst himself had issues with the default sudo config, which was his motivation to develop doas.[3] doas was released with OpenBSD 5.8 in October 2015 replacing sudo.[1] However, OpenBSD still provides sudo as a package.[1]
Configuration
editDefinition of privileges should be written in the configuration file, /etc/doas.conf.[8] The syntax used in the configuration file is inspired by the packet filter configuration file.[3]
Examples
editAllow user1 to execute procmap as root without password:[citation needed]
permit nopass user1 as root cmd /usr/sbin/procmap
Allow members of the wheel group to run any command as root:
permit :wheel as root
Simpler version (only works if default user is root, which it is after install):
permit :wheel
To allow members of wheel group to run any command (default as root) and remember that they entered the password:
permit persist :wheel
Ports and availability
editJesse Smith’s[9] port of doas is packaged for DragonFlyBSD,[10] FreeBSD,[11] and NetBSD.[12] According to the author, it also works on illumos and macOS.[13]
OpenDoas, a Linux port, is packaged for Debian, Alpine, Arch, CRUX, Fedora, Gentoo, GNU Guix, Hyperbola, Manjaro, Parabola, NixOS, Ubuntu, and Void Linux.[14] Starting with Alpine Linux v3.16 release, OpenDoas became the suggested replacement for sudo, which got its security maintenance time reduced within the distribution.[15]
See also
editReferences
edit- ^ a b c d "OpenBSD 5.8". www.openbsd.org. Archived from the original on 2021-05-17. Retrieved 2020-05-06.
- ^ "src/usr.bin/doas/doas.c - view - 1.98". 2022-12-22. Retrieved 2023-07-22.
- ^ a b c "doas - dedicated openbsd application subexecutor". flak.tedunangst.com. Retrieved 2022-01-01.
- ^ "Archived copy". Archived from the original on 2021-03-03. Retrieved 2021-09-29.
{{cite web}}: CS1 maint: archived copy as title (link) - ^ – OpenBSD General Commands Manual
- ^ Yegulalp, Serdar (2016-07-25). "OpenBSD 6.0 tightens security by losing Linux compatibility". InfoWorld. Archived from the original on 2021-07-25. Retrieved 2020-05-06.
- ^ Millman, Rene (18 October 2019). "Linux Sudo bug could allow hackers root access". SC Media UK. Archived from the original on 2021-09-29. Retrieved 2020-05-06.
- ^ "Privileges | OpenBSD Handbook". www.openbsdhandbook.com. Archived from the original on 2021-03-03. Retrieved 2020-05-06.
- ^ "Slicer69 (Jesse Smith) · GitHub". GitHub. Archived from the original on 2021-08-31. Retrieved 2020-05-06.
- ^ "DPorts/Security/Doas at master · DragonFlyBSD/DPorts · GitHub". GitHub. Archived from the original on 2021-03-03. Retrieved 2020-08-24.
- ^ "[ports] Log of /Head/Security/Doas/PKG-descr". Archived from the original on 2021-09-29. Retrieved 2020-08-24.
- ^ "The NetBSD Packages Collection: security/doas". ftp.netbsd.org. Archived from the original on 2021-09-29. Retrieved 2020-05-06.
- ^ Smith, Jesse. "doas". GitHub. Archived from the original on 2021-04-27. Retrieved 2020-08-24.
- ^ "opendoas". repology.org. Archived from the original on 2021-03-03. Retrieved 2020-08-24.
- ^ "Alpine 3.16.0 released". alpinelinux.org. Retrieved 2023-06-10.