Intrusion Detection and Prevention Systems (IDPS) Security Requirements Guide
Rules, Groups, and Values defined within the XCCDF Benchmark
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SRG-NET-000019-IDPS-00019
<GroupDescription></GroupDescription>Group -
The IDPS must restrict or block harmful or suspicious communications traffic between interconnected networks based on attribute- and content-based inspection of the source, destination, headers, and/or content of the communications traffic.
<VulnDiscussion>The IDPS enforces approved authorizations by controlling the flow of information between interconnected networks to prevent h...Rule Medium Severity -
SRG-NET-000074-IDPS-00059
<GroupDescription></GroupDescription>Group -
The IDPS must produce audit records containing sufficient information to establish what type of event occurred, including, at a minimum, event descriptions, policy filter, rule or signature invoked, port, protocol, and criticality level/alert code or description.
<VulnDiscussion>Without establishing what type of event occurred, it would be difficult to establish, correlate, and investigate the events l...Rule Medium Severity -
SRG-NET-000075-IDPS-00060
<GroupDescription></GroupDescription>Group -
The IDPS must produce audit records containing information to establish when (date and time) the events occurred.
<VulnDiscussion>Without establishing the time (date/time) an event occurred, it would be difficult to establish, correlate, and investigate t...Rule Medium Severity -
SRG-NET-000076-IDPS-00061
<GroupDescription></GroupDescription>Group -
SRG-NET-000131-IDPS-00097
<GroupDescription></GroupDescription>Group -
The IDPS must produce audit records containing information to establish where the event was detected, including, at a minimum, network segment, destination address, and IDPS component which detected the event.
<VulnDiscussion>Associating where the event was detected with the event log entries provides a means of investigating an attack or identifyin...Rule Medium Severity -
SRG-NET-000077-IDPS-00062
<GroupDescription></GroupDescription>Group -
The IDPS must produce audit records containing information to establish the source of the event, including, at a minimum, originating source address.
<VulnDiscussion>Associating the source of the event with detected events in the logs provides a means of investigating an attack or suspected...Rule Medium Severity -
SRG-NET-000078-IDPS-00063
<GroupDescription></GroupDescription>Group -
The IDPS must produce audit records containing information to establish the outcome of events associated with detected harmful or potentially harmful traffic, including, at a minimum, capturing all associated communications traffic.
<VulnDiscussion>Associating event outcome with detected events in the log provides a means of investigating an attack or suspected attack. W...Rule Medium Severity -
SRG-NET-000089-IDPS-00069
<GroupDescription></GroupDescription>Group -
In the event of a logging failure caused by the lack of audit record storage capacity, the IDPS must continue generating and storing audit records if possible, overwriting the oldest audit records in a first-in-first-out manner.
<VulnDiscussion>It is critical that when the IDPS is at risk of failing to process audit logs as required, it takes action to mitigate the fa...Rule Medium Severity -
SRG-NET-000113-IDPS-00082
<GroupDescription></GroupDescription>Group -
The IDPS must provide audit record generation capability for events where communication traffic is blocked or restricted based on policy filters, rules, signatures, and anomaly analysis.
<VulnDiscussion>Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...Rule Medium Severity -
SRG-NET-000511-IDPS-00012
<GroupDescription></GroupDescription>Group -
The IDPS must be configured to remove or disable non-essential features, functions, and services of the IDPS application.
<VulnDiscussion>An IDPS can be capable of providing a wide variety of capabilities. Not all of these capabilities are necessary. Unnecessary ...Rule Medium Severity -
SRG-NET-000192-IDPS-00140
<GroupDescription></GroupDescription>Group -
The IDPS must block outbound traffic containing known and unknown DoS attacks by ensuring that security policies, signatures, rules, and anomaly detection techniques are applied to outbound communications traffic.
<VulnDiscussion>The IDPS must include protection against DoS attacks that originate from inside the enclave which can affect either internal ...Rule Medium Severity -
SRG-NET-000229-IDPS-00163
<GroupDescription></GroupDescription>Group -
The IDPS must block any prohibited mobile code at the enclave boundary when it is detected.
<VulnDiscussion>Mobile code is defined as software modules obtained from remote systems, transferred across a network, and then downloaded an...Rule Medium Severity -
SRG-NET-000235-IDPS-00169
<GroupDescription></GroupDescription>Group -
The IDPS must fail to a secure state which maintains access control mechanisms when the IDPS hardware, software, or firmware fails on initialization/shutdown or experiences a sudden abort during normal operation.
<VulnDiscussion>Failure to a known safe state helps prevent systems from failing to a state that may cause loss of data or unauthorized acces...Rule Medium Severity -
SRG-NET-000236-IDPS-00170
<GroupDescription></GroupDescription>Group -
The IDPS must provide log information in a format that can be extracted and used by centralized analysis tools.
<VulnDiscussion>Centralized review and analysis of log records from multiple IDPS components gives the organization the capability to better ...Rule Medium Severity -
In the event of a failure of the IDPS function, the IDPS must save diagnostic information, log system messages, and load the most current security policies, rules, and signatures when restarted.
<VulnDiscussion>Failure in a secure state address safety or security in accordance with the mission needs of the organization. Failure to a s...Rule Medium Severity -
SRG-NET-000246-IDPS-00175
<GroupDescription></GroupDescription>Group -
The IDPS must verify the integrity of updates obtained directly from the vendor.
<VulnDiscussion>If the integrity of updates downloaded directly from the vendor is not verified, then malicious code or errors may impact the...Rule Medium Severity -
SRG-NET-000249-IDPS-00176
<GroupDescription></GroupDescription>Group -
The IDPS must block malicious code.
<VulnDiscussion>Configuring the IDPS to delete and/or quarantine based on local organizational incident handling procedures minimizes the imp...Rule Medium Severity -
SRG-NET-000273-IDPS-00198
<GroupDescription></GroupDescription>Group -
The IDPS must block outbound ICMP Destination Unreachable, Redirect, and Address Mask reply messages.
<VulnDiscussion>Internet Control Message Protocol (ICMP) messages are used to provide feedback about problems in the network. These messages ...Rule Medium Severity -
SRG-NET-000019-IDPS-00187
<GroupDescription></GroupDescription>Group -
SRG-NET-000512-IDPS-00194
<GroupDescription></GroupDescription>Group -
The IDPS must generate a log record when unauthorized network services are detected.
<VulnDiscussion>Unauthorized or unapproved network services lack organizational verification or validation and therefore may be unreliable or...Rule Medium Severity -
The IDPS must immediately use updates made to policy filters, rules, signatures, and anomaly analysis algorithms for traffic detection and prevention functions.
<VulnDiscussion>Information flow policies regarding dynamic information flow control include, for example, allowing or disallowing informatio...Rule Medium Severity -
SRG-NET-000113-IDPS-00013
<GroupDescription></GroupDescription>Group -
The IDPS must provide audit record generation capability for detection events based on implementation of policy filters, rules, signatures, and anomaly analysis.
<VulnDiscussion>Without the capability to generate audit records, it would be difficult to establish, correlate, and investigate the events r...Rule Medium Severity -
SRG-NET-000113-IDPS-00189
<GroupDescription></GroupDescription>Group -
The IDPS must provide audit record generation with a configurable severity and escalation level capability.
<VulnDiscussion>Without the capability to generate audit records with a severity code it is difficult to track and handle detection events. ...Rule Medium Severity -
SRG-NET-000333-IDPS-00190
<GroupDescription></GroupDescription>Group -
IDPS must support centralized management and configuration of the content captured in audit records generated by all IDPS components.
<VulnDiscussion>Without the ability to centrally manage the content captured in the log records, identification, troubleshooting, and correla...Rule Medium Severity -
SRG-NET-000334-IDPS-00191
<GroupDescription></GroupDescription>Group -
The IDPS must off-load log records to a centralized log server.
<VulnDiscussion>Information stored in one location is vulnerable to accidental or incidental deletion or alteration. Off-loading ensures audi...Rule Medium Severity -
SRG-NET-000385-IDPS-00211
<GroupDescription></GroupDescription>Group -
The IDPS must off-load log records to a centralized log server in real-time.
<VulnDiscussion>Off-loading ensures audit information does not get overwritten if the limited audit storage capacity is reached and also prot...Rule Medium Severity -
SRG-NET-000335-IDPS-00223
<GroupDescription></GroupDescription>Group -
The IDPS must assign a critical severity level to all audit processing failures.
<VulnDiscussion>It is critical that when the IDPS is at risk of failing to process audit logs as required, it takes action to mitigate the fa...Rule Medium Severity
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