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OL 9 must restrict access to the kernel message buffer.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-271745OL09-00-002406SV-271745r1117266_ruleCCI-001082medium
Description
Preventing unauthorized information transfers mitigates the risk of information, including encrypted representations of information, produced by the actions of prior users/roles (or the actions of processes acting on behalf of prior users/roles) from being available to any current users/roles (or current processes) that obtain access to shared system resources (e.g., registers, main memory, hard disks) after those resources have been released back to information systems. The control of information in shared resources is also commonly referred to as object reuse and residual information protection. This requirement generally applies to the design of an information technology product, but it can also apply to the configuration of particular information system components that are, or use, such products. This can be verified by acceptance/validation processes in DOD or other government agencies. There may be shared resources with configurable protections (e.g., files in storage) that may be assessed on specific information system components. Restricting access to the kernel message buffer limits access to only root. This prevents attackers from gaining additional system information as a nonprivileged user. Satisfies: SRG-OS-000132-GPOS-00067, SRG-OS-000138-GPOS-00069
STIGDate
Oracle Linux 9 Security Technical Implementation Guide2026-02-17

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

SEA-03.2Application Partitioning
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (19) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-3Access Enforcement
1.00
AC-6(10)Prohibit Non-privileged Users from Executing Privileged Functions
1.00
AU-9Protection of Audit Information
1.00
CM-5(1)Automated Access Enforcement and Audit Records
1.00
CM-5(3)Signed Components
1.00
CM-5(6)Limit Library Privileges
1.00
CM-6Configuration Settings
1.00
CM-7Least Functionality
1.00
IA-5(2)Public Key-based Authentication
1.00
SC-2Separation of System and User Functionality
1.00

+9 more (top 10 by confidence shown)

NIST 800-1710 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

3.13.3
1.00
CCI1 mapping
CCI-001082
1.00

Details

Check Text (C-271745r1117266_chk)

Verify that OL 9 is configured to restrict access to the kernel message buffer with the following commands: Check the status of the kernel.dmesg_restrict kernel parameter. $ sudo sysctl kernel.dmesg_restrict kernel.dmesg_restrict = 1 If "kernel.dmesg_restrict" is not set to "1" or is missing, this is a finding.

Fix Text (F-75702r1091946_fix)

Configure OL 9 to restrict access to the kernel message buffer. Add or edit the following line in /etc/sysctl.d/99-sysctl.conf system configuration file: kernel.dmesg_restrict = 1 Load settings from all system configuration files with the following command: $ sudo sysctl --system