STIGQter STIGQter: STIG Summary: Canonical Ubuntu 18.04 LTS Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

The Ubuntu operating system must generate audit records for successful/unsuccessful uses of the fchmodat system call.

DISA Rule

SV-219256r610963_rule

Vulnerability Number

V-219256

Group Title

SRG-OS-000064-GPOS-00033

Rule Version

UBTU-18-010333

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Configure the audit system to generate an audit event for any successful/unsuccessful use of the "fchmodat" system call.

Add or update the following rules in the "/etc/audit/rules.d/stig.rules" file:

-a always,exit -F arch=b32 -S fchmodat -F auid>=1000 -F auid!=4294967295 -k perm_chng
-a always,exit -F arch=b64 -S fchmodat -F auid>=1000 -F auid!=4294967295 -k perm_chng

Notes: For 32-bit architectures, only the 32-bit specific entries are required.
The "root" account must be used to view/edit any files in the /etc/audit/rules.d/ directory.

In order to reload the rules file, issue the following command:

# sudo augenrules --load

Check Contents

Verify the Ubuntu operating system generates an audit record when successful/unsuccessful attempts to use the "fchmodat" system call.

Check the configured audit rules with the following commands:

# sudo auditctl -l | grep fchmodat
-a always,exit -F arch=b32 -S fchmodat -F auid>=1000 -F auid!=-1 -k perm_chng
-a always,exit -F arch=b64 -S fchmodat -F auid>=1000 -F auid!=-1 -k perm_chng

If the command does not return lines that match the example or the lines are commented out, this is a finding.

Note:
For 32-bit architectures, only the 32-bit specific output lines from the commands are required.
The '-k' allows for specifying an arbitrary identifier and the string after it does not need to match the example output above.

Vulnerability Number

V-219256

Documentable

False

Rule Version

UBTU-18-010333

Severity Override Guidance

Verify the Ubuntu operating system generates an audit record when successful/unsuccessful attempts to use the "fchmodat" system call.

Check the configured audit rules with the following commands:

# sudo auditctl -l | grep fchmodat
-a always,exit -F arch=b32 -S fchmodat -F auid>=1000 -F auid!=-1 -k perm_chng
-a always,exit -F arch=b64 -S fchmodat -F auid>=1000 -F auid!=-1 -k perm_chng

If the command does not return lines that match the example or the lines are commented out, this is a finding.

Note:
For 32-bit architectures, only the 32-bit specific output lines from the commands are required.
The '-k' allows for specifying an arbitrary identifier and the string after it does not need to match the example output above.

Check Content Reference

M

Target Key

4055

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