| Finding ID |
Severity |
Title |
Description |
|
V-92263
|
High |
The SEL-2740S must uniquely identify all network-connected endpoint devices before establishing any connection. |
Controlling LAN access via identification of connecting hosts can assist in preventing a malicious user from connecting an unauthorized PC to a switch port to inject or receive data from the network without detection. |
|
V-94587
|
Medium |
The SEL-2740S must authenticate all network-connected endpoint devices before establishing any connection. |
Without authenticating devices, unidentified or unknown devices may be introduced, thereby facilitating malicious activity.
For distributed architectures (e.g., service-oriented architectures), the decisions regarding the validation of authentication claims may be made by services separate from the services acting on those decisions. In such situations, it is necessary to provide authentication... |
|
V-92325
|
Medium |
The SEL-2740S must be configured with ARP flow rules that are statically created with valid IP-to-MAC address bindings. |
DAI intercepts Address Resolution Protocol (ARP) requests and verifies that each of these packets has a valid IP-to-MAC address binding before updating the local ARP cache and before forwarding the packet to the appropriate destination. Invalid ARP packets are dropped and logged. DAI determines the validity of an ARP packet... |
|
V-92323
|
Medium |
SEL-2740S flow rules must include the host IP addresses that are bound to designated SEL-2740S ports for ensuring trusted host access. |
IP Source Guard provides source IP address filtering on a Layer 2 port to prevent a malicious host from impersonating a legitimate host by assuming the legitimate host's IP address. The feature uses dynamic DHCP snooping and static IP source binding to match IP addresses to hosts on untrusted Layer... |
|
V-92321
|
Medium |
The SEL-2740S must be configured to prevent packet flooding and bandwidth saturation. |
Access layer switches use the Content Addressable Memory (CAM) table to direct traffic to specific ports based on the VLAN number and the destination MAC address of the frame. When a router has an Address Resolution Protocol (ARP) entry for a destination host and forwards it to the access layer... |
|
V-92319
|
Medium |
The SEL-2740S must be configured to capture flows for real-time visualization tools. |
Without the capability to remotely view/hear all content related to a user session, investigations into suspicious user activity would be hampered. Real-time monitoring allows authorized personnel to take action before additional damage is done. The ability to observe user sessions as they are happening allows for interceding in ongoing events... |
|
V-92317
|
Medium |
The SEL-2740S must be configured to packet capture flows. |
Without the capability to select a user session to capture/record or view/hear, investigations into suspicious or harmful events would be hampered by the volume of information captured. The volume of information captured may also adversely impact the operation for the network. Session audits may include port mirroring, tracking websites visited,... |
|
V-92315
|
Medium |
The SEL-2740S -must be configured to limit excess bandwidth and denial of service (DoS) attacks. |
Denial of service is a condition when a resource is not available for legitimate users. Packet flooding 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-92313
|
Medium |
The SEL-2740S must be configured to permit the allowed and necessary ports, functions, protocols, and services. |
A compromised switch 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-92283
|
Medium |
The SEL-2740S must be configured to forward only frames from allowed network-connected endpoint devices. |
By only allowing frames to be forwarded from known end-points mitigates risks associated with broadcast, unknown unicast, and multicast traffic storms. |
|
V-92281
|
Medium |
The SEL-2740S must be configured with backup flows for all host and switch flows to ensure proper failover scheme is in place for the network. |
The SEL-2740S must be capable of multiple fast failover, backup and in cases isolation of the traffic from a detected threat in the system. |
|
V-92279
|
Medium |
The SEL-2740S must be configured to capture all packets without flow rule match criteria. |
The OTSDN switch must be capable of capturing frames that are not engineered to be in the network and send them to a Security Information and Event Manager (SIEM) or midpoint sensor for analysis. |
|
V-92277
|
Medium |
The SEL-2740S must be configured to mitigate the risk of ARP cache poisoning attacks. |
The SEL-2740S must deter ARP cache poisoning attacks and configure the specific ARP flows that are only necessary to the control system network. |