Différences

Ci-dessous, les différences entre deux révisions de la page.

--- tech:notes_userhelper_-_usermode [2025/06/01 15:54] – Jean-Baptiste
+++ tech:notes_userhelper_-_usermode [2026/06/07 19:12] (Version actuelle) – modification externe 127.0.0.1
@@ Ligne 1: / Ligne 1: @@
+<!DOCTYPE markdown>
+{{tag>Brouillon PAM CA}}
+# Notes userhelper - usermode
+# userhelper - usermode
+Voir :
+* https://pagure.io/usermode/
+* https://www.linux-magazine.com/content/download/63014/486800/version/1/file/Customizing_the_Root_Password_Window.pdf
+* consolehelper
+* [[Notes sécurité PAM]]
+* https://www.stigviewer.com/stig/red_hat_enterprise_linux_8/2021-12-03/finding/V-230431
+* https://www.cyberciti.biz/faq/restrict-execution-of-userhelper-to-console-users/
+* https://access.redhat.com/articles/1537873
+Voir aussi :
+* [[notes_sudo_et_sudoers]]
+* [[Rootkit pwnkit - local privilege escalation vulnerability pkexec cve-2021-4034]]
+usermode contains the userhelper program, which can be used to allow configured
+programs to be run with superuser privileges by ordinary users, and several
+graphical tools for users:
+* userinfo allows users to change their finger information.
+* usermount lets users mount, unmount, and format filesystems.
+* userpasswd allows users to change their passwords.
+~~~bash
+sudo /usr/sbin/userhelper -t -w subscription-manager identity
+~~~
+`/etc/security/console.apps/config-util`
+~~~ini
+USER=root
+UGROUPS=wheel
+~~~
+`/etc/security/console.apps/subscription-manager`
+~~~ini
+USER=root
+PROGRAM=/usr/sbin/subscription-manager
+SESSION=true
+~~~
+~~~
+# ls -l /usr/bin/subscription-manager
+lrwxrwxrwx. 1 root root 22 Feb 23 07:16 /usr/bin/subscription-manager -> /usr/bin/consolehelper
+# grep '^PROGRAM=' /etc/security/console.apps/subscription-manager
+PROGRAM=/usr/sbin/subscription-manager
+~~~
+## Test
+`/etc/pam.d/sleep`
+~~~
+#%PAM-1.0
+auth            include         config-util
+account         include         config-util
+session         include         config-util
+~~~
+ou
+`/etc/pam.d/sleep`
+~~~
+#%PAM-1.0
+auth       sufficient   pam_rootok.so
+auth required pam_warn.so
+auth required pam_deny.so
+auth       include      system-auth
+account    include      system-auth
+password   include      system-auth
+session    include      system-auth
+~~~
+`/etc/security/console.apps/sleep`
+~~~ini
+USER=root
+#UGROUPS=wheel
+PROGRAM=/usr/bin/sleep
+SESSION=true
+#KEEP_ENV_VARS=http_proxy,ftp_proxy
+#FALLBACK=yes
+~~~
+~~~bash
+/usr/sbin/userhelper -t -w sleep 1
+~~~