Detections
Analytics

1.432 RHEL-09-654210

Information

Successful/unsuccessful uses of the umount2 system call in RHEL 9 must generate an audit record.

GROUP ID: V-258216
RULE ID: SV-258216r1045433

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.

Satisfies: SRG-OS-000037-GPOS-00015, SRG-OS-000062-GPOS-00031, SRG-OS-000392-GPOS-00172, SRG-OS-000462-GPOS-00206, SRG-OS-000471-GPOS-00215

Solution

Configure the audit system to generate an audit event for any successful/unsuccessful use of the "umount2" system call by adding or updating the following rules in a file in "/etc/audit/rules.d".

-a always,exit -F arch=b32 -S umount2 -F auid>=1000 -F auid!=unset -k privileged-umount
-a always,exit -F arch=b64 -S umount2 -F auid>=1000 -F auid!=unset -k privileged-umount

To load the rules to the kernel immediately, use the following command:

$ sudo augenrules --load

See Also

https://workbench.cisecurity.org/benchmarks/22008

Item Details

Category: AUDIT AND ACCOUNTABILITY, MAINTENANCE

References: 800-53|AU-3, 800-53|AU-12a., 800-53|AU-12c., 800-53|MA-4(1), CAT|II, CCI|CCI-000130, CCI|CCI-000169, CCI|CCI-000172, CCI|CCI-002884, Rule-ID|SV-258216r1045433_rule, STIG-ID|RHEL-09-654210, Vuln-ID|V-258216

Plugin: Unix

Control ID: d6928dfe03b0fbf81b4cc266296a87748be653688e6ced0452fc4792b9ddd1a9