Application Layer Gateway Security Requirements Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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The ALG must provide an immediate real-time alert to, at a minimum, the SCA and ISSO, of all audit failure events where the detection and/or prevention function is unable to write events to either local storage or the centralized server.
Without a real-time alert, security personnel may be unaware of an impending failure of the audit capability and system operation may be adversely affected. Alerts provide organizations with urgen...Rule Medium Severity -
The ALG providing user authentication intermediary services must require users to reauthenticate when organization-defined circumstances or situations require reauthentication.
Without reauthentication, users may access resources or perform tasks for which they do not have authorization. In addition to the reauthentication requirements associated with session locks, orga...Rule Medium Severity -
The ALG providing user authentication intermediary services must implement multifactor authentication for remote access to privileged accounts such that one of the factors is provided by a device separate from the system gaining access.
For remote access to privileged accounts, the purpose of requiring a device that is separate from the information system gaining access for one of the factors during multifactor authentication is t...Rule Medium Severity -
The ALG providing content filtering must protect against or limit the effects of known and unknown types of Denial of Service (DoS) attacks by employing pattern recognition pre-processors.
If the network does not provide safeguards against DoS attacks, network resources will be unavailable to users. Installation of content filtering gateways and application layer firewalls at key bo...Rule Medium Severity -
The ALG must fail securely in the event of an operational failure.
If a boundary protection device fails in an unsecure manner (open), information external to the boundary protection device may enter, or the device may permit unauthorized information release. Sec...Rule Medium Severity -
The ALG must behave in a predictable and documented manner that reflects organizational and system objectives when invalid inputs are received.
A common vulnerability of network elements is unpredictable behavior when invalid inputs are received. This requirement guards against adverse or unintended system behavior caused by invalid inputs...Rule Medium Severity -
The ALG providing content filtering must detect use of network services that have not been authorized or approved by the ISSM and ISSO, at a minimum.
Unauthorized or unapproved network services lack organizational verification or validation and therefore may be unreliable or serve as malicious rogues for valid services. Examples of network serv...Rule Medium Severity -
The ALG providing content filtering must generate a log record when unauthorized network services are detected.
Unauthorized or unapproved network services lack organizational verification or validation and therefore may be unreliable or serve as malicious rogues for valid services. Examples of network serv...Rule Medium Severity -
The ALG providing content filtering must continuously monitor inbound communications traffic crossing internal security boundaries for unusual or unauthorized activities or conditions.
If inbound communications traffic is not continuously monitored, hostile activity may not be detected and prevented. Output from application and traffic monitoring serves as input to continuous mon...Rule Medium Severity -
The ALG providing content filtering must generate an alert to, at a minimum, the ISSO and ISSM when root level intrusion events which provide unauthorized privileged access are detected.
Without an alert, security personnel may be unaware of major detection incidents that require immediate action and this delay may result in the loss or compromise of information. The ALG generates...Rule Medium Severity
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