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Check: GEN003605

Solaris 9 X86 STIG: GEN003605 (in version v1 r9)

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 that routers forward the packet along a different path than configured on the router, which can be used to bypass network security measures.

Check Content

Verify the system does not apply reversed source routing to TCP responses. # ndd /dev/tcp tcp_rev_src_routes If the result is not 0, this is a finding.

Fix Text

Configure the system to not apply reversed source routing to TCP responses. # ndd -set /dev/tcp tcp_rev_src_routes 0 Also add this command to a system startup script.

Additional Identifiers

Rule ID: SV-26626r1_rule

Vulnerability ID: V-22412

Group Title:

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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