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Unicast Reverse Path Forwarding (uRPF) must be enabled on the NSX-T Tier-0 Gateway.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-251750T0RT-3X-000051SV-251750r810134_ruleCCI-001094high
Description
A compromised host in an enclave can be used by a malicious platform to launch cyber attacks on third parties. This is a common practice in "botnets", which are a collection of compromised computers using malware to attack other computers or networks. Distributed denial-of-service (DDoS) attacks frequently leverage IP source address spoofing to send packets to multiple hosts that in turn will then send return traffic to the hosts with the IP addresses that were forged. This can generate significant amounts of traffic. Therefore, protection measures to counteract IP source address spoofing must be taken. When uRPF is enabled in strict mode, the packet must be received on the interface that the device would use to forward the return packet; thereby mitigating IP source address spoofing.
STIGDate
VMware NSX-T Tier-0 Gateway RTR Security Technical Implementation Guide2022-09-01

Related Frameworks

1 mapping across 4 frameworks
SCF0 mappings

No source states a mapping between these directly.

Also reachable in 3 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

CAP-02Resource Priority
0.50
NIST 800-530 mappings

No source states a mapping between these directly.

Also reachable in 2 hops (16) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

AC-3Access Enforcement
1.00
AC-6(10)Prohibit Non-privileged Users from Executing Privileged Functions
1.00
AC-6(8)Privilege Levels for Code Execution
1.00
CM-11(2)Software Installation with Privileged Status
1.00
CM-5(1)Automated Access Enforcement and Audit Records
1.00
CM-5(6)Limit Library Privileges
1.00
CM-6Configuration Settings
1.00
CM-7Least Functionality
1.00
CM-7(2)Prevent Program Execution
1.00
SC-18(1)Identify Unacceptable Code and Take Corrective Actions
1.00

+6 more (top 10 by confidence shown)

CCI1 mapping
CCI-001094
1.00
NIST CSF 2.00 mappings

No source states a mapping between these directly.

Also reachable in 4 hops (1) derived by us, not asserted by any source

Each of these is a route we composed by chaining published mappings. No publisher states a relationship between the two endpoints.

PR.IR-04
0.50

Details

Check Text (C-251750r810134_chk)

From the NSX-T Manager web interface, go to Networking >> Tier-0 Gateways. For every Tier-0 Gateway, expand Tier-0 Gateway >> Interfaces, and then click on the number of interfaces present to open the interfaces dialog. Expand each interface to view the URPF Mode configuration. If URPF Mode is not set to "Strict" on any interface, this is a finding.

Fix Text (F-55141r810133_fix)

Enable strict URPF mode on interfaces by doing the following: From the NSX-T Manager web interface, go to Networking >> Tier-0 Gateways and expand the target Tier-0 gateway. Expand Interfaces, then click on the number of interfaces present to open the interfaces dialog. Select "Edit" on the target interface. From the drop-down, set the URPF mode to "Strict" and then click "Save".