Gestionnaire de fichiers - Editer - /usr/share/doc/audit-2.8.5/rules/30-pci-dss-v31.rules
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## The purpose of these rules is to meet the pci-dss v3.1 auditing requirements ## These rules depends on having 10-base-config.rules & 99-finalize.rules ## installed. ## NOTE: ## 1) if this is being used on a 32 bit machine, comment out the b64 lines ## 2) These rules assume that login under the root account is not allowed. ## 3) It is also assumed that 1000 represents the first usable user account. To ## be sure, look at UID_MIN in /etc/login.defs. ## 4) If these rules generate too much spurious data for your tastes, limit the ## the syscall file rules with a directory, like -F dir=/etc ## 5) You can search for the results on the key fields in the rules ## ## 10.1 Implement audit trails to link all access to individual user. ## This requirement is implicitly met ## 10.2.1 Implement audit trails to detect user accesses to cardholder data ## This would require a watch on the database that excludes the daemon's ## access. This rule is commented out due to needing a path name #-a always,exit -F path=path-to-db -F auid>=1000 -F auid!=unset -F uid!=daemon-acct -F perm=r -F key=10.2.1-cardholder-access ## 10.2.2 Log administrative action. To meet this, you need to enable tty ## logging. The pam config below should be placed into su and sudo pam stacks. ## session required pam_tty_audit.so disable=* enable=root ## 10.2.3 Access to all audit trails. -a always,exit -F dir=/var/log/audit/ -F perm=r -F auid>=1000 -F auid!=unset -F key=10.2.3-access-audit-trail -a always,exit -F path=/usr/sbin/ausearch -F perm=x -F key=10.2.3-access-audit-trail -a always,exit -F path=/usr/sbin/aureport -F perm=x -F key=10.2.3-access-audit-trail -a always,exit -F path=/usr/sbin/aulast -F perm=x -F key=10.2.3-access-audit-trail -a always,exit -F path=/usr/sbin/aulastlogin -F perm=x -F key=10.2.3-access-audit-trail -a always,exit -F path=/usr/sbin/auvirt -F perm=x -F key=10.2.3-access-audit-trail ## 10.2.4 Invalid logical access attempts. This is naturally met by pam. You ## can find these events with: ausearch --start today -m user_login -sv no -i ## 10.2.5.a Use of I&A mechanisms is logged. Pam naturally handles this. ## you can find the events with: ## ausearch --start today -m user_auth,user_chauthtok -i ## 10.2.5.b All elevation of privileges is logged -a always,exit -F arch=b64 -S setuid -F a0=0 -F exe=/usr/bin/su -F key=10.2.5.b-elevated-privs-session -a always,exit -F arch=b32 -S setuid -F a0=0 -F exe=/usr/bin/su -F key=10.2.5.b-elevated-privs-session -a always,exit -F arch=b64 -S setresuid -F a0=0 -F exe=/usr/bin/sudo -F key=10.2.5.b-elevated-privs-session -a always,exit -F arch=b32 -S setresuid -F a0=0 -F exe=/usr/bin/sudo -F key=10.2.5.b-elevated-privs-session -a always,exit -F arch=b64 -S execve -C uid!=euid -F euid=0 -F key=10.2.5.b-elevated-privs-setuid -a always,exit -F arch=b32 -S execve -C uid!=euid -F euid=0 -F key=10.2.5.b-elevated-privs-setuid ## 10.2.5.c All changes, additions, or deletions to any account are logged ## This is implicitly covered by shadow-utils. We will place some rules ## in case someone tries to hand edit the trusted databases -a always,exit -F path=/etc/group -F perm=wa -F key=10.2.5.c-accounts -a always,exit -F path=/etc/passwd -F perm=wa -F key=10.2.5.c-accounts -a always,exit -F path=/etc/gshadow -F perm=wa -F key=10.2.5.c-accounts -a always,exit -F path=/etc/shadow -F perm=wa -F key=10.2.5.c-accounts -a always,exit -F path=/etc/security/opasswd -F perm=wa -F key=10.2.5.c-accounts ## 10.2.6 Verify the following are logged: ## Initialization of audit logs ## Stopping or pausing of audit logs. ## These are handled implicitly by auditd ## 10.2.7 Creation and deletion of system-level objects ## This requirement seems to be database table related and not audit ## 10.3 Record at least the following audit trail entries ## 10.3.1 through 10.3.6 are implicitly met by the audit system. ## 10.4.2b Time data is protected. ## We will place rules to check time synchronization -a always,exit -F arch=b32 -S adjtimex,settimeofday,stime -F key=10.4.2b-time-change -a always,exit -F arch=b64 -S adjtimex,settimeofday -F key=10.4.2b-time-change -a always,exit -F arch=b32 -S clock_settime -F a0=0x0 -F key=10.4.2b-time-change -a always,exit -F arch=b64 -S clock_settime -F a0=0x0 -F key=10.4.2b-time-change # Introduced in 2.6.39, commented out because it can make false positives #-a always,exit -F arch=b32 -S clock_adjtime -F key=10.4.2b-time-change #-a always,exit -F arch=b64 -S clock_adjtime -F key=10.4.2b-time-change -w /etc/localtime -p wa -k 10.4.2b-time-change ## 10.5 Secure audit trails so they cannot be altered ## The audit system protects audit logs by virtue of being the root user. ## That means that no normal user can tamper with the audit trail. If for ## some reason you suspect that admins may be malicious or that their acct ## could be compromised, then enable the remote logging plugin and get the ## logs off the system to assure that there is an unaltered copy. ## 10.5.1 Limit viewing of audit trails to those with a job-related need. ## The audit daemon by default limits viewing of the auit trail to root. ## If someone that is not an admin has a job related need to see logs, then ## create a unique group for people with this need and set the log_group ## configuration item in auditd.conf ## 10.5.2 Protect audit trail files from unauthorized modifications. ## See discussion in 10.5 above ## 10.5.3 Promptly back up audit trail files to a centralized log server ## See discussion in 10.5 above ## 10.5.4 Write logs for external-facing technologies onto a secure, ## centralized, internal log serve ## See discussion in 10.5 above ## 10.5.5 Use file-integrity monitoring or change-detection software on logs -a always,exit -F dir=/var/log/audit/ -F perm=wa -F key=10.5.5-modification-audit ## Feel free to add watches on other critical logs # -a always,exit -F path=path-to-log -F perm=wa -F key=10.5.5-modification-log
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