Finding ID | Version | Rule ID | IA Controls | Severity |
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V-38566 | RHEL-06-000197 | SV-50367r3_rule | Low |
Description |
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Unsuccessful attempts to access files could be an indicator of malicious activity on a system. Auditing these events could serve as evidence of potential system compromise. |
STIG | Date |
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Red Hat Enterprise Linux 6 Security Technical Implementation Guide | 2020-05-19 |
Check Text ( C-46124r2_chk ) |
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To verify that the audit system collects unauthorized file accesses, run the following commands: # grep EACCES /etc/audit/audit.rules -a always,exit -F arch=b32 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EACCES -F auid>=500 -F auid!=4294967295 -k access -a always,exit -F arch=b32 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EACCES -F auid=0 -k access -a always,exit -F arch=b64 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EACCES -F auid>=500 -F auid!=4294967295 -k access -a always,exit -F arch=b64 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EACCES -F auid=0 -k access # grep EPERM /etc/audit/audit.rules -a always,exit -F arch=b32 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EPERM -F auid>=500 -F auid!=4294967295 -k access -a always,exit -F arch=b32 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EPERM -F auid=0 -k access -a always,exit -F arch=b64 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EPERM -F auid>=500 -F auid!=4294967295 -k access -a always,exit -F arch=b64 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EPERM -F auid=0 -k access If the system is 64-bit and does not return rules for both "b32" and "b64" architectures, this is a finding. If either command lacks output, this is a finding. |
Fix Text (F-43514r3_fix) |
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At a minimum, the audit system should collect unauthorized file accesses for all users and root. Add the following to "/etc/audit/audit.rules": -a always,exit -F arch=b32 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EACCES -F auid>=500 -F auid!=4294967295 -k access -a always,exit -F arch=b32 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EPERM -F auid>=500 -F auid!=4294967295 -k access -a always,exit -F arch=b32 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EACCES -F auid=0 -k access -a always,exit -F arch=b32 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EPERM -F auid=0 -k access If the system is 64-bit, then also add the following: -a always,exit -F arch=b64 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EACCES -F auid>=500 -F auid!=4294967295 -k access -a always,exit -F arch=b64 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EPERM -F auid>=500 -F auid!=4294967295 -k access -a always,exit -F arch=b64 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EACCES -F auid=0 -k access -a always,exit -F arch=b64 -S creat -S open -S openat -S truncate \ -S ftruncate -F exit=-EPERM -F auid=0 -k access |