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Check: GEN005500

IRIX 6.5: GEN005500 (in versions v1 r1 through v1 r0.6)

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

Check the SSH daemon configuration for allowed protocol versions. # grep -i protocol /etc/ssh/sshd_config | grep -v '^#' # grep -i protocol /etc/openssh/sshd_config | grep -v '^#' If the variables Protocol 2,1 or Protocol 1 are defined on a line without a leading comment, this is a finding.

Fix Text

Edit the configuration file and modify the Protocol line to look like: Protocol 2 Reload sshd: kill -HUP <PID of sshd>

Additional Identifiers

Rule ID:

Vulnerability ID: V-4295

Group Title:

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