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RHEL 9 debug-shell systemd service must be disabled.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-257786RHEL-09-211055SV-257786r1044834_ruleCCI-002235medium
Description
The debug-shell requires no authentication and provides root privileges to anyone who has physical access to the machine. While this feature is disabled by default, masking it adds an additional layer of assurance that it will not be enabled via a dependency in systemd. This also prevents attackers with physical access from trivially bypassing security on the machine through valid troubleshooting configurations and gaining root access when the system is rebooted. Satisfies: SRG-OS-000324-GPOS-00125, SRG-OS-000480-GPOS-00227
STIGDate
Red Hat Enterprise Linux 9 Security Technical Implementation Guide2025-05-14

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.

IAC-21.5Prohibit Non-Privileged Users from Executing Privileged Functions
1.00
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (50) 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-2(1)Automated System Account Management
1.00
AC-2(10)Shared and Group Account Credential Change
1.00
AC-2(2)Automated Temporary and Emergency Account Management
1.00
AC-2(3)Disable Accounts
1.00
AC-2(4)Automated Audit Actions
1.00
AC-3Access Enforcement
1.00
AC-3(4)Discretionary Access Control
1.00
AC-3(7)Role-based Access Control
1.00
AC-4Information Flow Enforcement
1.00
AC-6(10)Prohibit Non-privileged Users from Executing Privileged Functions
1.00

+40 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.

3.1.7
1.00
CCI1 mapping
CCI-002235
1.00

Details

Check Text (C-257786r1044834_chk)

Verify RHEL 9 is configured to mask the debug-shell systemd service with the following command: $ sudo systemctl status debug-shell.service debug-shell.service Loaded: masked (Reason: Unit debug-shell.service is masked.) Active: inactive (dead) If the "debug-shell.service" is loaded and not masked, this is a finding.

Fix Text (F-61451r943025_fix)

Configure RHEL 9 to mask the debug-shell systemd service with the following command: $ sudo systemctl disable --now debug-shell.service $ sudo systemctl mask --now debug-shell.service