| Finding ID |
Severity |
Title |
Description |
|
V-251750
|
High |
Unicast Reverse Path Forwarding (uRPF) must be enabled on the NSX-T Tier-0 Gateway. |
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... |
|
V-251749
|
High |
The NSX-T Tier-0 Gateway must be configured to restrict traffic destined to itself. |
The route processor handles traffic destined to the router, the key component used to build forwarding paths, and is also instrumental with all network management functions. Hence, any disruption or DoS attack to the route processor can result in mission critical network outages. |
|
V-251756
|
Medium |
The NSX-T Tier-0 Gateway must be configured to use the BGP maximum prefixes feature to protect against route table flooding and prefix de-aggregation attacks. |
The effects of prefix de-aggregation can degrade router performance due to the size of routing tables and also result in black-holing legitimate traffic. Initiated by an attacker or a misconfigured router, prefix de-aggregation occurs when the announcement of a large prefix is fragmented into a collection of smaller prefix announcements.... |
|
V-251755
|
Medium |
The NSX-T Tier-0 Gateway must be configured to have Internet Control Message Protocol (ICMP) redirects disabled on all external interfaces. |
The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Routers automatically send ICMP messages under a wide variety of conditions. Redirect ICMP messages are commonly used by attackers for network mapping and diagnosis. |
|
V-251754
|
Medium |
The NSX-T Tier-0 Gateway must be configured to have Internet Control Message Protocol (ICMP) mask replies disabled on all external interfaces. |
The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Routers automatically send ICMP messages under a wide variety of conditions. Mask Reply ICMP messages are commonly used by attackers for network mapping and diagnosis. |
|
V-251753
|
Medium |
The NSX-T Tier-0 Gateway must be configured to have Internet Control Message Protocol (ICMP) unreachable notifications disabled on all external interfaces. |
The ICMP supports IP traffic by relaying information about paths, routes, and network conditions. Routers automatically send ICMP messages under a wide variety of conditions. Host unreachable ICMP messages are commonly used by attackers for network mapping and diagnosis. |
|
V-251752
|
Medium |
The NSX-T Tier-0 Gateway must be configured to use a unique key for each autonomous system (AS) with which it peers. |
If the same keys are used between eBGP neighbors, the chance of a hacker compromising any of the BGP sessions increases. It is possible that a malicious user exists in one autonomous system who would know the key used for the eBGP session. This user would then be able to... |
|
V-251751
|
Medium |
The NSX-T Tier-0 Gateway must be configured to implement message authentication for all control plane protocols. |
A rogue router could send a fictitious routing update to convince a site's perimeter router to send traffic to an incorrect or even a rogue destination. This diverted traffic could be analyzed to learn confidential information about the site's network or used to disrupt the network's ability to communicate with... |
|
V-251748
|
Medium |
The NSX-T Tier-0 Gateway must be configured to enforce a Quality-of-Service (QoS) policy to limit the effects of packet flooding denial-of-service (DoS) attacks. |
DoS is a condition when a resource is not available for legitimate users. Packet flooding distributed denial-of-service (DDoS) attacks are referred to as volumetric attacks and have the objective of overloading a network or circuit to deny or seriously degrade performance, which denies access to the services that normally traverse... |
|
V-251745
|
Medium |
The NSX-T Tier-0 Gateway must be configured to disable Protocol Independent Multicast (PIM) on all interfaces that are not required to support multicast routing. |
If multicast traffic is forwarded beyond the intended boundary, it is possible that it can be intercepted by unauthorized or unintended personnel. Limiting where, within the network, a given multicast group's data is permitted to flow is an important first step in improving multicast security.
A scope zone is an... |
|
V-251744
|
Medium |
The NSX-T Tier-0 Gateway must be configured to reject inbound route advertisements for any prefixes belonging to the local autonomous system (AS). |
Accepting route advertisements belonging to the local AS can result in traffic looping or being black holed, or at a minimum using a non-optimized path. |
|
V-251759
|
Low |
The NSX-T Tier-0 Gateway must be configured to have multicast disabled if not in use. |
A compromised router introduces risk to the entire network infrastructure, as well as data resources that are accessible via the network. The perimeter defense has no oversight or control of attacks by malicious users within the network. Preventing network breaches from within is dependent on implementing a comprehensive defense-in-depth strategy,... |
|
V-251758
|
Low |
The NSX-T Tier-0 Gateway must be configured to have routing protocols disabled if not in use. |
A compromised router introduces risk to the entire network infrastructure, as well as data resources that are accessible via the network. The perimeter defense has no oversight or control of attacks by malicious users within the network. Preventing network breaches from within is dependent on implementing a comprehensive defense-in-depth strategy,... |
|
V-251757
|
Low |
The NSX-T Tier-0 Gateway must be configured to use its loopback address as the source address for iBGP peering sessions. |
Using a loopback address as the source address offers a multitude of uses for security, access, management, and scalability of the BGP routers. It is easier to construct appropriate ingress filters for router management plane traffic destined to the network management subnet since the source addresses will be from the... |
|
V-251747
|
Low |
The NSX-T Tier-0 Gateway must be configured to have the DHCP service disabled if not in use. |
A compromised router introduces risk to the entire network infrastructure, as well as data resources that are accessible via the network. The perimeter defense has no oversight or control of attacks by malicious users within the network. Preventing network breaches from within is dependent on implementing a comprehensive defense-in-depth strategy,... |
|
V-251746
|
Low |
The NSX-T Tier-0 Gateway must be configured to have all inactive interfaces removed. |
An inactive interface is rarely monitored or controlled and may expose a network to an undetected attack on that interface.
If an interface is no longer used, the configuration must be deleted. |
