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Check: GEN003606

HP-UX 11.31 STIG: GEN003606 (in versions v1 r19 through v1 r14)

Title

The system must prevent local applications from generating source-routed packets. (Cat II impact)

Discussion

Source-routed packets allow the source of the packet to suggest routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures.

Check Content

Check the system for an IP Filter (IPF) rule blocking outgoing source-routed packets. # ipfstat -o Examine the list for rules such as: block out log quick [all] | [from any to any] with opt lsrr block out log quick [all] | [from any to any] with opt ssrr If the listed rules do not block both lsrr and ssrr options, this is a finding.

Fix Text

Edit /etc/opt/ipf/ipf.conf and add rules to block outgoing source-routed packets, such as: block out log quick [all] | [from any to any] with opt lsrr block out log quick [all] | [from any to any] with opt ssrr Reload the IPF rules: # ipf -Fa -A -f /etc/opt/ipf/ipf.conf

Additional Identifiers

Rule ID: SV-29707r2_rule

Vulnerability ID: V-22413

Group Title: GEN003606

Expert Comments

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CCIs

CCIs tied to check.

Number	Definition
CCI-001551	The organization defines approved authorizations for controlling the flow of information between interconnected systems.

Controls

Controls tied to check. These are derived from the CCIs shown above.

Number	Title
AC-4	Information Flow Enforcement