SV-248784r958412_rule
V-248784
SRG-OS-000037-GPOS-00015
OL08-00-030420
CAT II
10
Configure the audit system to generate an audit event for any use of the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls by adding or updating the following rules in the "/etc/audit/rules.d/audit.rules" file:
-a always,exit -F arch=b32 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k perm_access
-a always,exit -F arch=b64 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k perm_access
-a always,exit -F arch=b32 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k perm_access
-a always,exit -F arch=b64 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k perm_access
The audit daemon must be restarted for the changes to take effect. To restart the audit daemon, run the following command:
$ sudo service auditd restart
Verify OL 8 generates an audit record for any use of the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls by running the following command to check the file system rules in "/etc/audit/audit.rules":
$ sudo grep 'open\|truncate\|creat' /etc/audit/audit.rules
-a always,exit -F arch=b32 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k perm_access
-a always,exit -F arch=b64 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k perm_access
-a always,exit -F arch=b32 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k perm_access
-a always,exit -F arch=b64 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k perm_access
If the output does not produce rules containing "-F exit=-EPERM", this is a finding.
If the output does not produce rules containing "-F exit=-EACCES", this is a finding.
If the command does not return an audit rule for "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" or any of the lines returned are commented out, this is a finding.
Note: The "-k" allows for specifying an arbitrary identifier, and the string after it does not need to match the example output above.
V-248784
False
OL08-00-030420
Verify OL 8 generates an audit record for any use of the "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" system calls by running the following command to check the file system rules in "/etc/audit/audit.rules":
$ sudo grep 'open\|truncate\|creat' /etc/audit/audit.rules
-a always,exit -F arch=b32 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k perm_access
-a always,exit -F arch=b64 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EPERM -F auid>=1000 -F auid!=unset -k perm_access
-a always,exit -F arch=b32 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k perm_access
-a always,exit -F arch=b64 -S truncate,ftruncate,creat,open,openat,open_by_handle_at -F exit=-EACCES -F auid>=1000 -F auid!=unset -k perm_access
If the output does not produce rules containing "-F exit=-EPERM", this is a finding.
If the output does not produce rules containing "-F exit=-EACCES", this is a finding.
If the command does not return an audit rule for "truncate", "ftruncate", "creat", "open", "openat", and "open_by_handle_at" or any of the lines returned are commented out, this is a finding.
Note: The "-k" allows for specifying an arbitrary identifier, and the string after it does not need to match the example output above.
M
5416