Difference between revisions of "Sudo"
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↑ https://askubuntu.com/questions/192050/how-to-run-sudo-command-with-no-password
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| − | <code>[[wikipedia:sudo|sudo]]</code> is a program for Unix-like computer operating systems that allows users to run programs with the security privileges of another user. | + | {{lowercase}} |
| + | <code>[[wikipedia:sudo|sudo]]</code> (1980s) is a program for Unix-like computer operating systems that allows users to run programs with the security privileges of another user. | ||
| + | * Man page: https://man7.org/linux/man-pages/man8/sudo.8.html | ||
| − | * Add user to sudo group: <code>sudo [[usermod]] '''-a'''G sudo YOUR_USERNAME</code> | + | == Examples == |
| + | * Add user to sudo [[group]]: <code>sudo [[usermod]] '''-a'''G sudo YOUR_USERNAME</code> | ||
| + | * <code>[[sudo -u postgres psql]]</code> | ||
== Task == | == Task == | ||
* Allow user YOUR_USER_NAME to run sudo commands without typing the password: | * Allow user YOUR_USER_NAME to run sudo commands without typing the password: | ||
| − | Include in <code>/etc/sudoers</code>, using the <code>visudo</code> command, the following line at the end of the file: | + | Include in <code>[[/etc/sudoers]]</code>, using the <code>visudo</code> command, the following line at the end of the file: |
<code>YOUR_USER_NAME ALL=(ALL) NOPASSWD:ALL</code><ref>https://askubuntu.com/questions/192050/how-to-run-sudo-command-with-no-password</ref> | <code>YOUR_USER_NAME ALL=(ALL) NOPASSWD:ALL</code><ref>https://askubuntu.com/questions/192050/how-to-run-sudo-command-with-no-password</ref> | ||
| Line 12: | Line 16: | ||
* Use [[Ansible]] to modify file for [[passwordless sudo]] execution in [[Ubuntu]] | * Use [[Ansible]] to modify file for [[passwordless sudo]] execution in [[Ubuntu]] | ||
| + | |||
| + | == [[Security vulnerabilities]] == | ||
| + | * [[CVE]]-2019-14287 https://nvd.nist.gov/vuln/detail/CVE-2019-14287, https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14287. CVSS Base Score: 8.8 | ||
| + | Exploitable if the following configuration is present: | ||
| + | :<code>username hostname = (ALL, !root) path-to-command</code> | ||
| + | |||
| + | == Errors == | ||
| + | sudo: unable to resolve host | ||
| + | See: <code>[[resolv.conf]]</code> | ||
| + | |||
| + | [sudo] password for USERNAME: | ||
| + | USERNAME is not in the sudoers file. This incident will be reported. | ||
== Options == | == Options == | ||
* <code>-S, --[[stdin]]</code> | * <code>-S, --[[stdin]]</code> | ||
| + | * <code>[[-u]]</code> | ||
| + | |||
| + | == Related terms == | ||
| + | * [[Qualys]] | ||
| + | * <code>[[sudoedit]]</code> | ||
| + | * <code>[[become_method]]</code> | ||
| + | * <code>[[SET SESSION AUTHORIZATION]]</code> | ||
| + | * [[gosu]] | ||
| + | * [[kubectl]] [[--as]] | ||
== See also == | == See also == | ||
* {{Linux Commands privileges}} | * {{Linux Commands privileges}} | ||
| − | * [[journalctl]] | + | * [[journalctl]], [[machinectl]] |
| + | * {{become}} | ||
[[Category:Linux]] | [[Category:Linux]] | ||
[[Category:Linux commands]] | [[Category:Linux commands]] | ||
Latest revision as of 09:26, 2 November 2023
sudo (1980s) is a program for Unix-like computer operating systems that allows users to run programs with the security privileges of another user.
Examples[edit]
- Add user to sudo group:
sudo usermod -aG sudo YOUR_USERNAME sudo -u postgres psql
Task[edit]
- Allow user YOUR_USER_NAME to run sudo commands without typing the password:
Include in /etc/sudoers, using the visudo command, the following line at the end of the file:
YOUR_USER_NAME ALL=(ALL) NOPASSWD:ALL[1]
- Understand order rules are applied and impact: https://vim.fandom.com/wiki/Set_Vim_as_your_default_editor_for_Unix
- Use Ansible to modify file for passwordless sudo execution in Ubuntu
Security vulnerabilities[edit]
- CVE-2019-14287 https://nvd.nist.gov/vuln/detail/CVE-2019-14287, https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-14287. CVSS Base Score: 8.8
Exploitable if the following configuration is present:
username hostname = (ALL, !root) path-to-command
Errors[edit]
sudo: unable to resolve host
See: resolv.conf
[sudo] password for USERNAME: USERNAME is not in the sudoers file. This incident will be reported.
Options[edit]
Related terms[edit]
See also[edit]
sudo,id,visudo,useradd,userdel,usermod,groups,passwd,chown,chmod,chgrp,groupadd,groupdel, Passwordless sudo, passwd (package),sudo --help- journalctl, machinectl
sudo, doas, Polkit (pkexec)
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