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Web Server Security Requirements Guide

Version

V4R4

Benchmark ID

Web_Server_SRG

Total Checks

126

Tags

web
CAT I: 5CAT II: 121CAT III: 0

This Security Requirements Guide is published as a tool to improve the security of Department of Defense (DOD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.

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Checks (126)

V-206350MEDIUMThe web server must limit the number of allowed simultaneous session requests.V-206351MEDIUMThe web server must perform server-side session management.V-206352MEDIUMThe web server must use encryption strength in accordance with the categorization of data hosted by the web server when remote connections are provided.V-206353MEDIUMThe web server must use cryptography to protect the integrity of remote sessions.V-206354MEDIUMThe web server must generate information to be used by external applications or entities to monitor and control remote access.V-206355MEDIUMThe web server must enforce approved authorizations for logical access to hosted applications and resources in accordance with applicable access control policies.V-206356MEDIUMThe web server must generate, at a minimum, log records for system startup and shutdown, system access, and system authentication events.V-206357MEDIUMThe web server must initiate session logging upon start up.V-206359MEDIUMThe web server must produce log records containing sufficient information to establish what type of events occurred.V-206360MEDIUMThe web server must produce log records containing sufficient information to establish when (date and time) events occurred.V-206361MEDIUMThe web server must produce log records containing sufficient information to establish where within the web server the events occurred.V-206362MEDIUMThe web server must produce log records containing sufficient information to establish the source of events.V-206363MEDIUMA web server, behind a load balancer or proxy server, must produce log records containing the client IP information as the source and destination and not the load balancer or proxy IP information with each event.V-206364MEDIUMThe web server must produce log records that contain sufficient information to establish the outcome (success or failure) of events.V-206365MEDIUMThe web server must produce log records containing sufficient information to establish the identity of any user/subject or process associated with an event.V-206366MEDIUMThe web server must use a logging mechanism that is configured to alert the ISSO and SA in the event of a processing failure.V-206367MEDIUMThe web server must use the internal system clock to generate time stamps for log records.V-206368MEDIUMWeb server log files must only be accessible by privileged users.V-206369MEDIUMThe log information from the web server must be protected from unauthorized modification.V-206370MEDIUMThe log information from the web server must be protected from unauthorized deletion.V-206371MEDIUMThe log data and records from the web server must be backed up onto a different system or media.V-206372MEDIUMAll web server files must be verified for their integrity (e.g., checksums and hashes) before becoming part of the production web server.V-206373MEDIUMExpansion modules must be fully reviewed, tested, and signed before they can exist on a production web server.V-206374MEDIUMThe web server must not perform user management for hosted applications.V-206375MEDIUMThe web server must only contain services and functions necessary for operation.V-206376MEDIUMThe web server must not be a proxy server.V-206377MEDIUMThe web server must provide install options to exclude the installation of documentation, sample code, example applications, and tutorials.V-206378MEDIUMWeb server accounts not utilized by installed features (i.e., tools, utilities, specific services, etc.) must not be created and must be deleted when the web server feature is uninstalled.V-206379MEDIUMThe web server must provide install options to exclude installation of utility programs, services, plug-ins, and modules not necessary for operation.V-206380MEDIUMThe web server must have Multipurpose Internet Mail Extensions (MIME) that invoke OS shell programs disabled.V-206381MEDIUMThe web server must allow the mappings to unused and vulnerable scripts to be removed.V-206382MEDIUMThe web server must have resource mappings set to disable the serving of certain file types.V-206383MEDIUMThe web server must have Web Distributed Authoring (WebDAV) disabled.V-206384MEDIUMThe web server must protect system resources and privileged operations from hosted applications.V-206385MEDIUMUsers and scripts running on behalf of users must be contained to the document root or home directory tree of the web server.V-206386MEDIUMThe web server must be configured to use a specified IP address and port.V-206387MEDIUMThe web server must encrypt passwords during transmission.V-206388MEDIUMThe web server must perform RFC 5280-compliant certification path validation.V-206389MEDIUMOnly authenticated system administrators or the designated PKI Sponsor for the web server must have access to the web servers private key.V-206390HIGHThe web server must use cryptographic modules that meet the requirements of applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance when encrypting stored data.V-206391MEDIUMThe web server must use cryptographic modules that meet the requirements of applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance for such authentication.V-206392MEDIUMA web server utilizing mobile code must meet DoD-defined mobile code requirements.V-206393MEDIUMWeb server accounts accessing the directory tree, the shell, or other operating system functions and utilities must only be administrative accounts.V-206394MEDIUMAnonymous user access to the web server application directories must be prohibited.V-206395MEDIUMThe web server must separate the hosted applications from hosted web server management functionality.V-206396MEDIUMThe web server must invalidate session identifiers upon hosted application user logout or other session termination.V-206397MEDIUMCookies exchanged between the web server and client, such as session cookies, must have security settings that disallow cookie access outside the originating web server and hosted application.V-206398MEDIUMThe web server must accept only system-generated session identifiers.V-206399HIGHThe web server must generate a unique session identifier for each session using a FIPS 140-2 approved random number generator.V-206400MEDIUMThe web server must generate unique session identifiers that cannot be reliably reproduced.V-206401MEDIUMThe web server must generate a session ID long enough that it cannot be guessed through brute force.V-206402MEDIUMThe web server must generate a session ID using as much of the character set as possible to reduce the risk of brute force.V-206403MEDIUMThe web server must generate unique session identifiers with definable entropy.V-206404MEDIUMThe web server must augment re-creation to a stable and known baseline.V-206405MEDIUMThe web server must be built to fail to a known safe state if system initialization fails, shutdown fails, or aborts fail.V-206406MEDIUMThe web server must provide a clustering capability.V-206407MEDIUMInformation at rest must be encrypted using a DOD-accepted algorithm to protect the confidentiality and integrity of the information.V-206408MEDIUMThe web server document directory must be in a separate partition from the web servers system files.V-206409MEDIUMThe web server must restrict the ability of users to launch Denial of Service (DoS) attacks against other information systems or networks.V-206410MEDIUMThe web server must limit the character set used for data entry.V-206411MEDIUMThe web server must display a default hosted application web page, not a directory listing, when a requested web page cannot be found.V-206412MEDIUMWarning and error messages displayed to clients must be modified to minimize the identity of the web server, patches, loaded modules, and directory paths.V-206413MEDIUMDebugging and trace information used to diagnose the web server must be disabled.V-206414MEDIUMThe web server must set an absolute session timeout value of eight hours or less.V-206415MEDIUMThe web server must set an inactive timeout for sessions.V-206416MEDIUMRemote access to the web server must follow access policy or work in conjunction with enterprise tools designed to enforce policy requirements.V-206417MEDIUMThe web server must restrict inbound connections from nonsecure zones.V-206418MEDIUMThe web server must provide the capability to immediately disconnect or disable remote access to the hosted applications.V-206419MEDIUMNon-privileged accounts on the hosting system must only access web server security-relevant information and functions through a distinct administrative account.V-206421MEDIUMThe web server must use a logging mechanism that is configured to allocate log record storage capacity large enough to accommodate the logging requirements of the web server.V-206422MEDIUMThe web server must not impede the ability to write specified log record content to an audit log server.V-206423MEDIUMThe web server must be configurable to integrate with an organizations security infrastructure.V-206424MEDIUMThe web server must use a logging mechanism that is configured to provide a warning to the ISSO and SA when allocated record storage volume reaches 75% of maximum log record storage capacity.V-206425MEDIUMThe web server must generate log records that can be mapped to Coordinated Universal Time (UTC) or Greenwich Mean Time (GMT).V-206426MEDIUMThe web server must record time stamps for log records to a minimum granularity of one second.V-206427MEDIUMThe web server application, libraries, and configuration files must only be accessible to privileged users.V-206428MEDIUMThe web server must prohibit or restrict the use of nonsecure or unnecessary ports, protocols, modules, and/or services.V-206430MEDIUMThe web server must only accept client certificates (user and machine) issued by DOD PKI or DOD-approved PKI Certificate Authorities (CAs).V-206431HIGHThe web server must encrypt user identifiers and passwords.V-206432MEDIUMThe web server must be protected from being stopped by a non-privileged user.V-206433MEDIUMThe web server must be tuned to handle the operational requirements of the hosted application.V-206434HIGHThe web server must employ cryptographic mechanisms (TLS/DTLS/SSL) preventing the unauthorized disclosure of information during transmission.V-206435MEDIUMWeb server session IDs must be sent to the client using SSL/TLS.V-206436MEDIUMWeb server cookies, such as session cookies, sent to the client using SSL/TLS must not be compressed.V-206437MEDIUMCookies exchanged between the web server and the client, such as session cookies, must have cookie properties set to prohibit client-side scripts from reading the cookie data.V-206438MEDIUMCookies exchanged between the web server and the client, such as session cookies, must have cookie properties set to force the encryption of cookies.V-206439MEDIUMA web server must maintain the confidentiality of controlled information during transmission through the use of an approved TLS version.V-206440MEDIUMThe web server must remove all export ciphers to protect the confidentiality and integrity of transmitted information.V-206441MEDIUMThe web server must maintain the confidentiality and integrity of information during preparation for transmission.V-206442MEDIUMThe web server must maintain the confidentiality and integrity of information during reception.V-206443MEDIUMThe web server must install security-relevant software updates within 30 days unless the time period is directed by an authoritative source (e.g., IAVM, CTOs, DTMs, STIGs).V-206444MEDIUMAll accounts installed with the web server software and tools must have passwords assigned and default passwords changed.V-206445MEDIUMThe web server must be configured in accordance with the security configuration settings based on DoD security configuration or implementation guidance, including STIGs, NSA configuration guides, CTOs, and DTMs.V-239371MEDIUMThe web server must implement required cryptographic protections using cryptographic modules complying with applicable federal laws, Executive Orders, directives, policies, regulations, standards, and guidance when encrypting data that must be compartmentalized.V-264337MEDIUMThe web server must disable accounts when the accounts have expired.V-264338MEDIUMThe web server must disable accounts when the accounts are no longer associated to a user.V-264339MEDIUMThe web server must implement the capability to centrally review and analyze audit records from multiple components within the system.V-264340MEDIUMThe web server must alert organization-defined personnel or roles upon detection of unauthorized access, modification, or deletion of audit information.V-264341MEDIUMThe web server must automatically generate audit records of the enforcement actions.V-264342MEDIUMThe web server must require users to be individually authenticated before granting access to the shared accounts or resources.V-264343MEDIUMThe web server must implement multifactor authentication for local; network; and/or remote access to privileged accounts; and/or nonprivileged accounts such that one of the factors is provided by a device separate from the system gaining access.V-264344MEDIUMThe web server must implement multifactor authentication for local; network; and/or remote access to privileged accounts; and/or nonprivileged accounts such that the device meets organization-defined strength of mechanism requirements.V-264345MEDIUMThe web server must, for password-based authentication, maintain a list of commonly used, expected, or compromised passwords on an organization-defined frequency.V-264346MEDIUMThe web server must, for password-based authentication, update the list of passwords on an organization-defined frequency.V-264347MEDIUMThe web server must, for password-based authentication, update the list of passwords when organizational passwords are suspected to have been compromised directly or indirectly.V-264348MEDIUMThe web server must, for password-based authentication, verify when users create or update passwords, that the passwords are not found on the list of commonly-used, expected, or compromised passwords in IA-5 (1) (a).V-264349MEDIUMThe web server must, for password-based authentication, store passwords using an approved salted key derivation function, preferably using a keyed hash.V-264350MEDIUMThe web server must, for password-based authentication, require immediate selection of a new password upon account recovery.V-264351MEDIUMThe web server must, for password-based authentication, allow user selection of long passwords and passphrases, including spaces and all printable characters.V-264352MEDIUMThe web server must, for password-based authentication, employ automated tools to assist the user in selecting strong password authenticators.V-264353MEDIUMThe web server must, for password-based authentication, enforce organization-defined composition and complexity rules.V-264354MEDIUMThe web server must, for public key-based authentication, implement a local cache of revocation data to support path discovery and validation.V-264355MEDIUMThe web server must protect nonlocal maintenance sessions by separating the maintenance session from other network sessions with the system by logically separated communications paths.V-264356MEDIUMThe web server must include only approved trust anchors in trust stores or certificate stores managed by the organization.V-264357MEDIUMThe web server must provide protected storage for cryptographic keys with organization-defined safeguards and/or hardware protected key store.V-264358MEDIUMThe web server must synchronize system clocks within and between systems or system components.V-264359MEDIUMThe web server must compare the internal system clocks on an organization-defined frequency with organization-defined authoritative time source.V-264360MEDIUMThe web server must restrict a consistent inbound source IP for the entire management session.V-264361MEDIUMThe web server must restrict a consistent inbound source IP for the entire user session.V-264362MEDIUMThe web server must use HTTP/2, at a minimum.V-264363MEDIUMThe web server must disable HTTP/1.x downgrading.V-264364MEDIUMThe web server must interpret and normalize ambiguous HTTP requests or terminate the TCP connection.V-264365MEDIUMThe web server must terminate the connection if server-level exceptions are triggered when handling requests to prevent HTTP request smuggling attacks.V-264366MEDIUMThe web server must only use forward proxies that route HTTP/2 requests upstream.V-279028MEDIUMThe web server must uniquely identify and authenticate source by organization, system, application, and/or individual for information transfer.V-279029HIGHThe web server must be a version supported by the vendor.