Changes are coming to https://stigviewer.com.
Take our survey to help us understand your usage and how we can better serve you in the future.
Take Survey
The audit system must be configured to audit all discretionary access control permission modifications using chmod.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-217962 | RHEL-06-000184 | SV-217962r505923_rule | Low |
| Description |
|---|
| The changing of file permissions could indicate that a user is attempting to gain access to information that would otherwise be disallowed. Auditing DAC modifications can facilitate the identification of patterns of abuse among both authorized and unauthorized users. |
| STIG | Date |
|---|---|
| Red Hat Enterprise Linux 6 Security Technical Implementation Guide | 2020-09-03 |
Details
| Check Text ( C-19443r376901_chk ) |
|---|
| To determine if the system is configured to audit calls to the "chmod" system call, run the following command: $ sudo grep -w "chmod" /etc/audit/audit.rules -a always,exit -F arch=b32 -S chmod -F auid>=500 -F auid!=4294967295 \ -k perm_mod -a always,exit -F arch=b32 -S chmod -F auid=0 -k perm_mod -a always,exit -F arch=b64 -S chmod -F auid>=500 -F auid!=4294967295 \ -k perm_mod -a always,exit -F arch=b64 -S chmod -F auid=0 -k perm_mod If the system is 64-bit and does not return a rule for both "b32" and "b64" architectures, this is a finding. If the system is not configured to audit the "chmod" system call, this is a finding. |
| Fix Text (F-19441r376902_fix) |
|---|
| At a minimum, the audit system should collect file permission changes for all users and root. Add the following to "/etc/audit/audit.rules": -a always,exit -F arch=b32 -S chmod -F auid>=500 -F auid!=4294967295 \ -k perm_mod -a always,exit -F arch=b32 -S chmod -F auid=0 -k perm_mod If the system is 64-bit, then also add the following: -a always,exit -F arch=b64 -S chmod -F auid>=500 -F auid!=4294967295 \ -k perm_mod -a always,exit -F arch=b64 -S chmod -F auid=0 -k perm_mod |