STIGQter: STIG Summary: Oracle Linux 6 Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 23 Apr 2021:

The SSH daemon must not allow host-based authentication.

DISA Rule

SV-208924r603263_rule

Vulnerability Number

V-208924

Group Title

SRG-OS-000106

Rule Version

OL6-00-000236

Severity

CAT II

CCI(s)

• CCI-000766 - The information system implements multifactor authentication for network access to non-privileged accounts.

Weight

10

Fix Recommendation

SSH's cryptographic host-based authentication is more secure than ".rhosts" authentication, since hosts are cryptographically authenticated. However, it is not recommended that hosts unilaterally trust one another, even within an organization.

To disable host-based authentication, add or correct the following line in "/etc/ssh/sshd_config":

HostbasedAuthentication no

Check Contents

To determine how the SSH daemon's "HostbasedAuthentication" option is set, run the following command:

# grep -i HostbasedAuthentication /etc/ssh/sshd_config

If no line, a commented line, or a line indicating the value "no" is returned, then the required value is set.
If the required value is not set, this is a finding.

Vulnerability Number

V-208924

Documentable

False

Rule Version

OL6-00-000236

Severity Override Guidance

To determine how the SSH daemon's "HostbasedAuthentication" option is set, run the following command:

# grep -i HostbasedAuthentication /etc/ssh/sshd_config

If no line, a commented line, or a line indicating the value "no" is returned, then the required value is set.
If the required value is not set, this is a finding.

Check Content Reference

M

Target Key

2928

Comments