Detections
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1.166 ALMA-09-021360

Information

AlmaLinux OS 9 SSH daemon must not allow rhosts authentication.

GROUP ID: V-269269
RULE ID: SV-269269r1050151

SSH trust relationships mean a compromise on one host can allow an attacker to move trivially to other hosts.

Solution

Configure the SSH daemon to not allow rhosts authentication.

Add the following line to "/etc/ssh/sshd_config", or uncomment the line and set the value to "yes":

IgnoreRhosts yes

Alternatively, add the setting to an include file if the line "Include /etc/ssh/sshd_config.d/*.conf" is found at the top of the "/etc/ssh/sshd_config" file:

$ echo 'IgnoreRhosts yes' > /etc/ssh/sshd_config.d/40-rhosts.conf

Restart the SSH daemon for the settings to take effect:

$ systemctl restart sshd.service

See Also

https://workbench.cisecurity.org/benchmarks/27039

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CCI|CCI-000366, Rule-ID|SV-269269r1050151_rule, STIG-ID|ALMA-09-021360, Vuln-ID|V-269269

Plugin: Unix

Control ID: adee2c2e008a01f4acf2ca69987ed216e39b45553cd3c36e8bc4050fbeac7774