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Check: GEN005501

HP-UX 11.31 STIG: GEN005501 (in versions v1 r19 through v1 r13)

Title

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

Discussion

SSHv1 is not a DoD-approved protocol and has many well-known vulnerability exploits. Exploits of the SSH client could provide access to the system with the privileges of the user running the client.

Check Content

Check the SSH client configuration for allowed protocol versions. Note that keywords are case-insensitive and arguments (args) are case-sensitive. keyword=Protocol arg(s)=2 # cat /opt/ssh/etc/ssh_config | tr '\011' ' ' | tr -s ' ' | sed -e 's/^[ \t]*//' | grep -v '^#' | grep -i "Protocol" If Protocol 2,1 (the default) or Protocol 1 are defined on a line without a leading comment, this is a finding.

Fix Text

Edit the client configuration file Protocol entry to look like: Protocol 2

Additional Identifiers

Rule ID: SV-35212r1_rule

Vulnerability ID: V-22456

Group Title: GEN005501

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