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update audit_ospp_general rule audit content to match latest content
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@vojtapolasek
vojtapolasek committed Nov 7, 2024
1 parent cf82959 commit 4f48eda
Showing 1 changed file with 62 additions and 35 deletions.
97 changes: 62 additions & 35 deletions linux_os/guide/auditing/policy_rules/audit_ospp_general/rule.yml
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Expand Up @@ -24,64 +24,91 @@ title: 'Perform general configuration of Audit for OSPP'
## User add delete modify. This is covered by pam. However, someone could
## open a file and directly create or modify a user, so we'll watch passwd and
## shadow for writes
-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&03 -F path=/etc/passwd -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&03 -F path=/etc/passwd -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b32 -S open -F a1&03 -F path=/etc/passwd -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b64 -S open -F a1&03 -F path=/etc/passwd -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&03 -F path=/etc/shadow -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&03 -F path=/etc/shadow -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b32 -S open -F a1&03 -F path=/etc/shadow -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b64 -S open -F a1&03 -F path=/etc/shadow -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&03 -F path=/etc/passwd -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&03 -F path=/etc/passwd -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b32 -S open -F a1&03 -F path=/etc/passwd -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b64 -S open -F a1&03 -F path=/etc/passwd -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&03 -F path=/etc/shadow -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&03 -F path=/etc/shadow -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b32 -S open -F a1&03 -F path=/etc/shadow -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b64 -S open -F a1&03 -F path=/etc/shadow -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify

## User enable and disable. This is entirely handled by pam.

## Group add delete modify. This is covered by pam. However, someone could
## open a file and directly create or modify a user, so we'll watch group and
## gshadow for writes
-a always,exit -F path=/etc/passwd -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F path=/etc/shadow -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F path=/etc/group -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=group-modify
-a always,exit -F path=/etc/gshadow -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=group-modify
-a always,exit -F arch=b32 -F path=/etc/passwd -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b64 -F path=/etc/passwd -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b32 -F path=/etc/shadow -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b64 -F path=/etc/shadow -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=user-modify
-a always,exit -F arch=b32 -F path=/etc/group -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=group-modify
-a always,exit -F arch=b64 -F path=/etc/group -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=group-modify
-a always,exit -F arch=b32 -F path=/etc/gshadow -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=group-modify
-a always,exit -F arch=b64 -F path=/etc/gshadow -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=group-modify


## Use of special rights for config changes. This would be use of setuid
## programs that relate to user accts. This is not all setuid apps because
## requirements are only for ones that affect system configuration.
-a always,exit -F path=/usr/sbin/unix_chkpwd -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/sbin/usernetctl -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/sbin/userhelper -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/sbin/seunshare -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/bin/mount -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/bin/newgrp -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/bin/newuidmap -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/bin/gpasswd -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/bin/newgidmap -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/bin/umount -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/bin/passwd -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/bin/crontab -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/bin/at -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F path=/usr/sbin/grub2-set-bootflag -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/sbin/unix_chkpwd -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/sbin/unix_chkpwd -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/sbin/usernetctl -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/sbin/usernetctl -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/sbin/userhelper -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/sbin/userhelper -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/sbin/seunshare -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/sbin/seunshare -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/bin/mount -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/bin/mount -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/bin/newgrp -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/bin/newgrp -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/bin/newuidmap -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/bin/newuidmap -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/bin/gpasswd -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/bin/gpasswd -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/bin/newgidmap -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/bin/newgidmap -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/bin/umount -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/bin/umount -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/bin/passwd -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/bin/passwd -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/bin/crontab -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/bin/crontab -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/bin/at -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/bin/at -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/usr/sbin/grub2-set-bootflag -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/usr/sbin/grub2-set-bootflag -F perm=x -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=special-config-changes

## Privilege escalation via su or sudo. This is entirely handled by pam.
## Special case for systemd-run. It is not audit aware, specifically watch it
-a always,exit -F path=/usr/bin/systemd-run -F perm=x -F auid!=unset -F key=maybe-escalation
-a always,exit -F arch=b32 -F path=/usr/bin/systemd-run -F perm=x -F auid!=unset -F key=maybe-escalation
-a always,exit -F arch=b64 -F path=/usr/bin/systemd-run -F perm=x -F auid!=unset -F key=maybe-escalation
## Special case for pkexec. It is not audit aware, specifically watch it
-a always,exit -F path=/usr/bin/pkexec -F perm=x -F key=maybe-escalation
-a always,exit -F arch=b32 -F path=/usr/bin/pkexec -F perm=x -F key=maybe-escalation
-a always,exit -F arch=b64 -F path=/usr/bin/pkexec -F perm=x -F key=maybe-escalation


## Watch for configuration changes to privilege escalation.
-a always,exit -F path=/etc/sudoers -F perm=wa -F key=special-config-changes
-a always,exit -F dir=/etc/sudoers.d/ -F perm=wa -F key=special-config-changes
-a always,exit -F arch=b32 -F path=/etc/sudoers -F perm=wa -F key=special-config-changes
-a always,exit -F arch=b64 -F path=/etc/sudoers -F perm=wa -F key=special-config-changes
-a always,exit -F arch=b32 -F dir=/etc/sudoers.d/ -F perm=wa -F key=special-config-changes
-a always,exit -F arch=b64 -F dir=/etc/sudoers.d/ -F perm=wa -F key=special-config-changes

## Audit log access
-a always,exit -F dir=/var/log/audit/ -F perm=r -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=access-audit-trail
-a always,exit -F arch=b32 -F dir=/var/log/audit/ -F perm=r -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=access-audit-trail
-a always,exit -F arch=b64 -F dir=/var/log/audit/ -F perm=r -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=access-audit-trail
## Attempts to Alter Process and Session Initiation Information
-a always,exit -F path=/var/run/utmp -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=session
-a always,exit -F path=/var/log/btmp -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=session
-a always,exit -F path=/var/log/wtmp -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=session
-a always,exit -F arch=b32 -F path=/var/run/utmp -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=session
-a always,exit -F arch=b64 -F path=/var/run/utmp -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=session
-a always,exit -F arch=b32 -F path=/var/log/btmp -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=session
-a always,exit -F arch=b64 -F path=/var/log/btmp -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=session
-a always,exit -F arch=b32 -F path=/var/log/wtmp -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=session
-a always,exit -F arch=b64 -F path=/var/log/wtmp -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=session

## Attempts to modify MAC controls
-a always,exit -F dir=/etc/selinux/ -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=MAC-policy
-a always,exit -F arch=b32 -F dir=/etc/selinux/ -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=MAC-policy
-a always,exit -F arch=b64 -F dir=/etc/selinux/ -F perm=wa -F auid>=" ~ uid_min ~ " -F auid!=unset -F key=MAC-policy

## Software updates. This is entirely handled by rpm.

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