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Check: GEN005500

AIX 6.1 SECURITY TECHNICAL IMPLEMENTATION GUIDE: GEN005500 (in versions v1 r14 through v1 r10)

Title

The SSH daemon must be configured to only use the SSHv2 protocol. (Cat I impact)

Discussion

SSHv1 is not a DoD-approved protocol and has many well-known vulnerability exploits. Exploits of the SSH daemon could provide immediate root access to the system.

Check Content

Examine the sshd configuration file. # cat /etc/ssh/sshd_config | grep -i "Protocol 2" If the value of "Protocol" is not set to 2, or is commented out, this is a finding.

Fix Text

Edit the configuration file and modify the Protocol line. Protocol 2 Restart sshd: /sbin/init.d/secsh stop /sbin/init.d/secsh start

Additional Identifiers

Rule ID: SV-40862r2_rule

Vulnerability ID: V-4295

Group Title: GEN005500

Expert Comments

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CCIs

CCIs tied to check.
Number Definition
CCI-001436

The organization disables organization-defined networking protocols within the information system deemed to be nonsecure except for explicitly identified components in support of specific operational requirements.

Controls

Controls tied to check. These are derived from the CCIs shown above.
Number Title
No controls are assigned to this check