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Check: GEN003605

HP-UX 11.31 STIG: GEN003605 (in versions v1 r19 through v1 r13)

Title

The system must not apply reversed source routing to TCP responses. (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

Determine if the system is configured to forward source-routed IP packets. When correctly configured, if ip_forward_src_routed is disabled, the system is also configured to disable reverse source routing to TCP responses to source-routed packets. # ndd -get /dev/ip ip_forward_src_routed If the returned value is not '0', this feature is enabled and this is a finding.

Fix Text

Disable the IP source-routed forwarding feature. # ndd -set /dev/ip ip_forward_src_routed 0 Edit /etc/rc.config.d/nddconf and add/set: TRANSPORT_NAME[x] = ip NDD_NAME[x] = ip_forward_src_routed NDD_VALUE[x] = 0

Additional Identifiers

Rule ID: SV-35028r1_rule

Vulnerability ID: V-22412

Group Title: GEN003605

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