The CA API Gateway providing content filtering must block outbound traffic containing known and unknown Denial of Service (DoS) attacks to protect against the use of internal information systems to launch any DoS attacks against other networks or endpoints.

Description

<VulnDiscussion>DoS attacks can take multiple forms but have the common objective of overloading or blocking a network or host to deny or seriously degrade performance. If the network does not provide safeguards against DoS attack, network resources will be unavailable to users. Installation of an ALG at key boundaries in the architecture mitigates the risk of DoS attacks. These attacks can be detected by matching observed communications traffic with patterns of known attacks and monitoring for anomalies in traffic volume/type. The ALG must include protection against DoS attacks that originate from inside the enclave, which can affect either internal or external systems. These attacks may use legitimate or rogue endpoints from inside the enclave. These attacks can be simple "floods" of traffic to saturate circuits or devices, malware that consumes CPU and memory on a device or causes it to crash, or a configuration issue that disables or impairs the proper function of a device. For example, an accidental or deliberate misconfiguration of a routing table can misdirect traffic for multiple networks. To comply with this requirement, the ALG must monitor outbound traffic for indications of known and unknown DoS attacks. Audit log capacity management, along with techniques that prevent the logging of redundant information during an attack, also guard against DoS attacks. The CA API Gateway must enable an inbound rate limit in an effort to provide safeguards against DoS attacks. By default, this is not turned on and will need to be enabled either in Global Policy or within each Registered Service. Additionally, a quota can be inserted within a Registered Service's policy to verify that any request exceeding the quota for an authenticated user, client IP, etc. will be denied access to the Registered Service. Furthermore, a message size limiter can be inserted into a policy to limit the size of any request being received or response being sent.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>