OpenShift must generate audit records when successful/unsuccessful attempts to modify privileges occur.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-257575	CNTR-OS-000930	SV-257575r921668_rule		Medium

Description

Audit records provide a crucial source of information for security monitoring and incident response. By generating audit records for privilege modification attempts, OpenShift enables administrators and security teams to track and investigate any unauthorized or suspicious changes to privileges. These records serve as an essential source of evidence for detecting and responding to potential security incidents. Audit records for unsuccessful attempts to modify privileges help in identifying unauthorized activities or potential attacks. If an unauthorized entity attempts to modify privileges, the audit records can serve as an early warning sign of a security threat. By monitoring and analyzing such records, administrators can detect and mitigate potential security breaches before they escalate. Audit records play a vital role in forensic analysis and investigation. In the event of a security incident or suspected compromise, audit logs for privilege modifications provide valuable information for understanding the scope and impact of the incident.

STIG	Date
Red Hat OpenShift Container Platform 4.12 Security Technical Implementation Guide	2023-08-28

Details

Check Text ( C-61310r921666_chk )

Verify OpenShift is configured to generate audit records when successful/unsuccessful attempts to modify privileges occur by executing the following: for node in $(oc get node -oname); do oc debug $node -- chroot /host /bin/bash -c 'echo -n "$HOSTNAME "; grep -e "key=unsuccessful-create" -e "key=unsuccessful-modification" -e "key=delete" -e "key=unsuccessful-access" -e "actions" -e "key=perm_mod" -e "audit_rules_usergroup_modification" -e "module-change" -e "logins" /etc/audit/audit.rules' 2>/dev/null; done Confirm the following rules exist on each node: -w /etc/group -p wa -k audit_rules_usergroup_modification -w /etc/gshadow -p wa -k audit_rules_usergroup_modification -w /etc/passwd -p wa -k audit_rules_usergroup_modification -w /etc/security/opasswd -p wa -k audit_rules_usergroup_modification -w /etc/shadow -p wa -k audit_rules_usergroup_modification -a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&0x40 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&0x40 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b32 -S open -F a1&0x40 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b64 -S open -F a1&0x40 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&0x40 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&0x40 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b32 -S open -F a1&0x40 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b64 -S open -F a1&0x40 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b32 -S creat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b64 -S creat -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b32 -S creat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b64 -S creat -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-create -a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&0x203 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&0x203 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b32 -S open -F a1&0x203 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b64 -S open -F a1&0x203 -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b32 -S openat,open_by_handle_at -F a2&0x203 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b64 -S openat,open_by_handle_at -F a2&0x203 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modmodule-changeification -a always,exit -F arch=b32 -S open -F a1&0x203 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b64 -S open -F a1&0x203 -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b32 -S truncate,ftruncate -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b64 -S truncate,ftruncate -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b32 -S truncate,ftruncate -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b64 -S truncate,ftruncate -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-modification -a always,exit -F arch=b32 -S open,creat,truncate,ftruncate,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-access -a always,exit -F arch=b64 -S open,truncate,ftruncate,creat,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -F key=unsuccessful-access -a always,exit -F arch=b32 -S open,creat,truncate,ftruncate,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-access -a always,exit -F arch=b64 -S open,truncate,ftruncate,creat,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -F key=unsuccessful-access -w /etc/sudoers.d -p wa -k actions -w /etc/sudoers -p wa -k actions -a always,exit -F arch=b32 -S chmod -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S chmod -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S chown -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S chown -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S fchmodat -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S fchmodat -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S fchmod -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S fchmod -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S fchownat -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S fchownat -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S fchown -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S fchown -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S fremovexattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S fremovexattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S fsetxattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S fsetxattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S delete_module -F key=module-change -a always,exit -F arch=b64 -S delete_module -F key=module-change -a always,exit -F arch=b32 -S finit_module -F key=module-change -a always,exit -F arch=b64 -S finit_module -F key=module-change -a always,exit -F arch=b32 -S init_module -F key=module-change -a always,exit -F arch=b64 -S init_module -F key=module-change -w /var/log/lastlog -p wa -k logins -a always,exit -F arch=b32 -S lchown -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S lchown -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S lremovexattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S lremovexattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S lsetxattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S lsetxattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S mount -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S mount -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S removexattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S removexattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S renameat -F auid>=1000 -F auid!=unset -F key=delete -a always,exit -F arch=b64 -S renameat -F auid>=1000 -F auid!=unset -F key=delete -a always,exit -F arch=b32 -S rename -F auid>=1000 -F auid!=unset -F key=delete -a always,exit -F arch=b64 -S rename -F auid>=1000 -F auid!=unset -F key=delete -a always,exit -F arch=b32 -S rmdir -F auid>=1000 -F auid!=unset -F key=delete -a always,exit -F arch=b64 -S rmdir -F auid>=1000 -F auid!=unset -F key=delete -a always,exit -F arch=b32 -S setxattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S setxattr -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=unset -F key=perm_mod -a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=unset -F key=perm_mod If the above rules are not listed on each node, this is a finding.

Fix Text (F-61234r921667_fix)

Apply the machine config to generate audit records when successful/unsuccessful attempts to modify privileges by executing the following: for mcpool in $(oc get mcp -oname | sed "s:.*/::" ); do echo "apiVersion: machineconfiguration.openshift.io/v1 kind: MachineConfig metadata: name: 75-modify-privileges-rules-$mcpool labels: machineconfiguration.openshift.io/role: $mcpool spec: config: ignition: version: 3.1.0 storage: files: - contents: source: data:,%23%23%20Make%20the%20loginuid%20immutable.%20This%20prevents%20tampering%20with%20the%20auid.%0A--loginuid-immutable%0A mode: 0644 path: /etc/audit/rules.d/11-loginuid.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20chmod%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20chmod%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-chmod_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20chown%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20chown%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-chown_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20fchmod%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20fchmod%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-fchmod_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20fchmodat%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20fchmodat%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-fchmodat_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20fchown%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20fchown%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-fchown_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20fchownat%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20fchownat%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-fchownat_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20fremovexattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20fremovexattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-fremovexattr_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20fsetxattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20fsetxattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-fsetxattr_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20lchown%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20lchown%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-lchown_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20lremovexattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20lremovexattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-lremovexattr_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20lsetxattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20lsetxattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-lsetxattr_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20removexattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20removexattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-removexattr_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20setxattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20setxattr%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-setxattr_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20umount2%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20umount%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-umount_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20umount2%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20umount2%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dperm_mod%0A mode: 0644 path: /etc/audit/rules.d/75-umount2_dac_modification.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20path%3D/usr/sbin/usermod%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dprivileged%0A mode: 0644 path: /etc/audit/rules.d/75-usr_sbin_usermod_execution.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20path%3D/usr/sbin/unix_update%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dprivileged%0A mode: 0644 path: /etc/audit/rules.d/75-usr_sbin_unix_update_execution.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20path%3D/usr/bin/kmod%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dprivileged%0A mode: 0644 path: /etc/audit/rules.d/75-usr_bin_kmod_execution.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20path%3D/usr/bin/setfacl%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dprivileged%0A mode: 0644 path: /etc/audit/rules.d/75-usr_bin_setfacl_execution.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20path%3D/usr/bin/chacl%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dprivileged%0A mode: 0644 path: /etc/audit/rules.d/75-usr_bin_chacl_execution.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20path%3D/usr/bin/chcon%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dprivileged%0A mode: 0644 path: /etc/audit/rules.d/75-usr_bin_chcon_execution.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20path%3D/usr/sbin/semanage%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dprivileged%0A mode: 0644 path: /etc/audit/rules.d/75-usr_sbin_semanage_execution.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20path%3D/usr/sbin/setfiles%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dprivileged%0A mode: 0644 path: /etc/audit/rules.d/75-usr_sbin_setfiles_execution.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20path%3D/usr/sbin/setsebool%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Dprivileged%0A mode: 0644 path: /etc/audit/rules.d/75-usr_sbin_setsebool_execution.rules overwrite: true - contents: source: data:,-a%20always%2Cexit%20-F%20arch%3Db32%20-S%20rename%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Ddelete%0A-a%20always%2Cexit%20-F%20arch%3Db64%20-S%20rename%20-F%20auid%3E%3D1000%20-F%20auid%21%3Dunset%20-F%20key%3Ddelete%0A mode: 0644 path: 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mode: 0644 path: /etc/audit/rules.d/30-ospp-v42-remediation.rules overwrite: true - contents: source: data:,-w%20/etc/group%20-p%20wa%20-k%20audit_rules_usergroup_modification%0A mode: 0644 path: /etc/audit/rules.d/30-etc_group_usergroup_modification.rules overwrite: true - contents: source: data:,-w%20/etc/gshadow%20-p%20wa%20-k%20audit_rules_usergroup_modification%0A mode: 0644 path: /etc/audit/rules.d/30-etc_gshadow_usergroup_modification.rules overwrite: true - contents: source: data:,-w%20/etc/security/opasswd%20-p%20wa%20-k%20audit_rules_usergroup_modification%0A mode: 0644 path: /etc/audit/rules.d/30-etc_security_opasswd_usergroup_modification.rules overwrite: true - contents: source: data:,-w%20/etc/passwd%20-p%20wa%20-k%20audit_rules_usergroup_modification%0A mode: 0644 path: /etc/audit/rules.d/30-etc_passwd_usergroup_modification.rules overwrite: true - contents: source: data:,-w%20/etc/shadow%20-p%20wa%20-k%20audit_rules_usergroup_modification%0A mode: 0644 path: /etc/audit/rules.d/30-etc_shadow_usergroup_modification.rules overwrite: true " | oc apply -f - done