STIGQter: STIG Summary: Oracle Linux 6 Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

The audit system must be configured to audit failed attempts to access files and programs.

DISA Rule

SV-208906r603263_rule

Vulnerability Number

V-208906

Group Title

SRG-OS-000064

Rule Version

OL6-00-000197

Severity

CAT III

CCI(s)

• CCI-000172 - The information system generates audit records for the events defined in AU-2 d. with the content defined in AU-3.

Weight

10

Fix Recommendation

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

Check Contents

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.

Vulnerability Number

V-208906

Documentable

False

Rule Version

OL6-00-000197

Severity Override Guidance

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.

Check Content Reference

M

Target Key

2928

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