STIGQter: STIG Summary: Intrusion Detection and Prevention Systems (IDPS) Security Requirements Guide Version: 2 Release: 6 Benchmark Date: 24 Jul 2020:

The IDPS must block outbound ICMP Destination Unreachable, Redirect, and Address Mask reply messages.

DISA Rule

SV-45716r2_rule

Vulnerability Number

V-34788

Group Title

SRG-NET-000273-IDPS-00198

Rule Version

SRG-NET-000273-IDPS-00198

Severity

CAT II

CCI(s)

• CCI-001312 - The information system generates error messages that provide information necessary for corrective actions without revealing information that could be exploited by adversaries.

Weight

10

Fix Recommendation

Configure the IDPS to block outbound ICMP Destination Unreachable, Redirect, and Address Mask reply messages.

An acceptable alternative to blocking all Destination Unreachable responses is to filter Destination Unreachable messages generated by the firewall implementation to allow ICMP Destination Unreachable--
Fragmentation Needed but DF Bit Set (Type 3, Code 4) and apply this filter to the external interfaces.

Check Contents

Verify the IDPS blocks outbound ICMP Destination Unreachable, Redirect, and Address Mask reply messages.

If the IDPS does not block outbound ICMP Destination Unreachable, Redirect, and Address Mask reply messages, this is a finding.

Vulnerability Number

V-34788

Documentable

False

Rule Version

SRG-NET-000273-IDPS-00198

Severity Override Guidance

Verify the IDPS blocks outbound ICMP Destination Unreachable, Redirect, and Address Mask reply messages.

If the IDPS does not block outbound ICMP Destination Unreachable, Redirect, and Address Mask reply messages, this is a finding.

Check Content Reference

M

Target Key

2358

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