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Check: GEN005537

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN005537 (in versions v1 r14 through v1 r10)

Title

The SSH daemon must use privilege separation. (Cat II impact)

Discussion

SSH daemon privilege separation causes the SSH process to drop root privileges when not needed, which would decrease the impact of software vulnerabilities in the unprivileged section.

Check Content

Check the SSH daemon configuration for the UsePrivilegeSeparation setting. # grep -i UsePrivilegeSeparation /etc/ssh/sshd_config | grep -v '^#' If the setting is present and set to "no", this is a finding. If the setting is not present or is set to "yes", this is not a finding.

Fix Text

Edit the /etc/ssh/sshd_config file and remove the UsePrivilegeSeparation setting or change the value of the UsePrivilegeSeparation setting to "yes".

Additional Identifiers

Rule ID: SV-40721r1_rule

Vulnerability ID: V-22486

Group Title: GEN005537

Expert Comments

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CCIs

CCIs tied to check.
Number Definition
CCI-000225

The organization employs the concept of least privilege, allowing only authorized accesses for users (and processes acting on behalf of users) which are necessary to accomplish assigned tasks in accordance with organizational missions and business functions.

Controls

Controls tied to check. These are derived from the CCIs shown above.
Number Title
AC-6

Least Privilege