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RHEL 10 must be configured so that the Secure Shell (SSH) daemon performs strict mode checking of home directory configuration files.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-281259RHEL-10-700560SV-281259r1184759_ruleCCI-002696medium
Description
If other users have access to modify user-specific SSH configuration files, they may be able to log in to the system as another user. OpenSSH uses the first occurrence of a keyword it sees, and drop-in files are read in lexicographical order at the start of the configuration. Red Hat recommends using drop-in files rather than changing base configuration files.
STIGDate
Red Hat Enterprise Linux 10 Security Technical Implementation Guide2026-03-11

Related Frameworks

1 mapping across 3 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.

CHG-06Control Functionality Verification
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (14) 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-3(4)Discretionary Access Control
1.00
AU-12Audit Record Generation
1.00
AU-3Content of Audit Records
1.00
AU-3(1)Additional Audit Information
1.00
AU-8Time Stamps
1.00
AU-9Protection of Audit Information
1.00
CM-3(5)Automated Security Response
1.00
CM-5(1)Automated Access Enforcement and Audit Records
1.00
CM-5(6)Limit Library Privileges
1.00
CM-7(2)Prevent Program Execution
1.00

+4 more (top 10 by confidence shown)

CCI1 mapping
CCI-002696
1.00

Details

Check Text (C-281259r1184759_chk)

Verify RHEL 10 SSH daemons perform strict mode checking of home directory configuration files with the following command: $ sudo /usr/sbin/sshd -dd 2>&1 | awk '/filename/ {print $4}' | tr -d '\r' | tr '\n' ' ' | xargs sudo grep -iH '^\s*strictmodes' /etc/ssh/sshd_config.d/10-stig.conf:StrictModes yes Verify the runtime setting with the following command: $ sudo sshd -T | grep -i strictmodes strictmodes yes If the "StrictModes" keyword is not set to "yes" in a drop-in that lexicographically precedes 50-redhat.conf, or if no output is returned, this is a finding.

Fix Text (F-85725r1166728_fix)

Configure RHEL 10 SSH daemons to perform strict mode checking of home directory configuration files. In "/etc/ssh/sshd_config.d", create a drop file that will lexicographically precede 50-redhat.conf and add the following line: StrictModes yes Restart the SSH service with the following command for the changes to take effect: $ sudo systemctl restart sshd.service