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GB 40050-2021 PDF in English

GB 40050-2021 (GB40050-2021) PDF English
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GB 40050-2021: PDF in English

GB 40050-2021
ICS 35.040
CCS L 80
Critical network devices security common
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Terms and definitions ... 4 
4 Abbreviations ... 6 
5 Security function requirements ... 7 
5.1 Device identification security ... 7 
5.2 Redundancy, backup recovery and anomaly detection ... 7 
5.3 Prevention of vulnerabilities and malicious programs ... 8 
5.4 Security of startup and update of pre-installed software ... 8 
5.5 User identification and authentication ... 9 
5.6 Access control security ... 10 
5.7 Log audit security ... 10 
5.8 Communication security ... 11 
5.9 Data security ... 12 
5.10 Password requirements... 12 
6 Security guarantee requirements ... 12 
6.1 Design and development... 12 
6.2 Production and delivery ... 13 
6.3 Operation and maintenance ... 14 
References ... 16 
Critical network devices security common
1 Scope
This document specifies the general security function requirements and
security assurance requirements for critical network device.
This document applies to critical network device; provides a basis for network
operators to purchase critical network device; is also suitable for guiding the
research and development, testing, and service of critical network device.
2 Normative references
The provisions in following documents become the provisions of this Standard
through reference in this Standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this Standard;
however, parties who reach an agreement based on this Standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 25069 Information security technology - Glossary
3 Terms and definitions
The terms and definitions as defined in GB/T 25069, as well as the following
terms and definitions, apply to this document.
A module or component, that is composed of several parts, which are
assembled together AND can realize a specific function.
Malicious program
A program, which is specifically designed to attack the system, damage or
destroy the confidentiality, integrity, or availability of the system.
5 Security function requirements
5.1 Device identification security
The identification of critical network device shall meet the following security
a) The whole hardware and main components shall have unique
Note 1: Common main components of routers and switches: main control board,
business board, switching network board, fan module, power supply, storage
system software board, hard disk or flash memory card, etc. Common main
components of servers: central processing unit, hard disk, memory, fan module,
power supply, etc.
Note 2: Common unique identification methods: serial number, etc.
b) Different versions of pre-installed software, patch packages/upgrade
packages shall be uniquely identified.
Note 3: Common unique identification method of version: version number, etc.
5.2 Redundancy, backup recovery and anomaly detection
The redundancy, backup recovery and anomaly detection functions of critical
network device shall meet the following security requirements.
a) The whole device shall support the main-standby switching function. OR
the key components shall support the redundancy function; provide the
automatic switching function. When the device or the key components are
abnormal, switch to the redundant device or redundant components, to
reduce the security risk.
Note: Common key components of routers and switches, that support redundant
functions: main control board, switching network board, power supply module,
fan module, etc. Common key components of servers, that support redundant
functions: hard disks, power modules, fan modules, etc.
b) It shall support the backup and recovery function of pre-installed software
and configuration files. When using the recovery function, it shall support
the integrity check of pre-installed software and configuration files.
c) It shall support abnormal state detection; generate relevant error message.
5.5 User identification and authentication
The user identification and authentication functions of critical network device
shall meet the following security requirements.
a) The user shall be identified and authenticated. The identification shall be
Note 1: Common methods of identity authentication: passwords, shared keys,
digital certificates or biometrics, etc.
b) When using the password authentication method, it shall support the
mandatory modification of the default password OR the setting of the
password, when the device is managed for the first time. OR it shall
support the random initial password; support the setting of the password
life cycle; support the password complexity check function. When the user
inputs password, there shall be no echo password, in plaintext.
c) Support password complexity checking function. Password complexity
checking includes at least one of password length checking, password
character type checking, password and account independence checking.
Note 2: Different types of critical network device have different password
complexity requirements and implementation methods. Examples of common
password length requirements: the password length is not less than 8 digits;
examples of common password character types: it contains at least two types of
numbers, lowercase letters, uppercase letters, punctuation marks, special
symbols; examples of common password requirements that are irrelevant to the
account: The password does not include account numbers, etc.
d) It shall support the activation of security policies or have security functions,
to prevent user authentication information guessing attacks.
Note 3: Common security policies or security functions to prevent user
authentication information guessing attacks include enabling password
complexity checking by default, limiting the number of consecutive illegal login
attempts, or supporting limiting the number of management access connections,
two-factor authentication (such as password + certificate, password + biometric
authentication, etc.). When authentication fails, the device provides
undifferentiated feedback, to avoid prompting specific information such as "user
name error" and "password error".
e) It shall support the activation of security policies OR have security
functions, to prevent the user's session from being idle for too long, after
that affect the security of device operation.
Note 1: Common key user operations include adding/deleting accounts,
modifying authentication information, modifying key configuration, file
uploading/downloading, user logging in/logging out, modifying user permissions,
restarting/closing the device, downloading programming logic, modifying
operating parameters, etc.
b) It shall provide the local storage function of log information, support the
log information output.
c) The log audit function shall record the necessary log elements AND
provide sufficient information for review and analysis.
Note 2: Common log elements include the date and time, subject, type, result,
source IP address, etc. of the event.
d) It shall have the security function to protect the log in the local storage and
output process; prevent the log content from being viewed, output or
deleted, without authorization.
Note 3: Common log protection security functions include user authorization
access control and so on.
e) It shall provide the function of dealing with the exhaustion of local log
storage space.
Note 4: The common processing functions, when the local log storage space is
exhausted, include alarming when the remaining storage space is below the
threshold, cyclic coverage, etc.
f) It shall not record the sensitive data, in plaintext or weakly encrypted
manner, in the log.
Note 5: Common weak encryption methods include message digest algorithm
(MD5), Base64, etc.
5.8 Communication security
The critical network device shall meet the following communication security
a) It shall support the establishment of a secure communication channel/path
with the management system (management user), to ensure the
confidentiality and integrity of communication data.
b) It shall meet the robustness requirements of the communication protocol,
a) It shall identify the security risks during device design and development;
formulate the security strategies.
Note: Common security risks in device design and development include security
risks in the development environment, security risks introduced by third-party
components, security risks caused by developers.
b) It shall establish the device security design and development operating
procedures, to ensure that the security strategy is implemented in the
entire process of design and development.
c) It shall establish a configuration management program and a list of
corresponding configuration items. The configuration management
system shall be able to track content changes; authorize and control the
d) Measures shall be taken to prevent devices from being implanted with
malicious programs.
e) Measures shall be taken to prevent the device from being set up with
hidden interfaces or functional modules.
f) Measures shall be taken to prevent security risks, that may be introduced
by third-party key components, firmware or software.
g) The security test of the device shall be carried out, by means of
vulnerability scanning, virus scanning, code audit, robustness test,
penetration test, security function verification.
h) It shall remedy OR provide remedial measures, for the discovered security
flaws, vulnerabilities and other security issues.
6.2 Production and delivery
Providers of critical network device shall meet the following requirements, in the
production and delivery of critical network device.
a) It shall identify the security risks, during device production and delivery;
formulate security strategies.
Note 1: Common security risks in production and delivery include risks, such as
tampering and forgery of self-made or purchased components, security risks in
the production environment, security risks in device implantation, security risks in
device vulnerabilities, logistics and transportation risks, etc.
b) It shall establish and implement a standardized device production process;
alternative plans; notify the user in time according to relevant
requirements AND report to the relevant competent authority.
d) When performing remote maintenance on the device, it shall clearly state
the maintenance content, risks and countermeasures; keep an
unchangeable remote maintenance log record. The record content shall
at least include maintenance time, maintenance content, maintenance
personnel, remote maintenance methods and tools.
Note 1: Common remote maintenance includes operations such as remote
upgrade of device, configuration modification, data reading, remote diagnosis.
e) When performing remote maintenance on device, it shall obtain the user
authorization; support the users to suspend remote maintenance. It shall
keep the authorization records.
Note 2: Common ways to obtain user authorization include authentication
information authorization, written authorization, etc.
f) Users shall be provided with methods, to verify the integrity and source
authenticity of the patch/upgrade package.
g) Users shall be provided with methods, for irreversible destruction of key
components or data in discarded (or decommissioned) device.
h) Users shall be provided with precautions for data leakage and other
security risk control, before the recycling or reuse of discarded (or
decommissioned) device.
i) For device or parts that are re-sold or provided after maintenance, the user
data in the device or parts shall be irreversibly destroyed.
j) The device shall be provided with continuous security maintenance, within
the agreed time limit; the security maintenance shall not be unilaterally
interrupted or terminated, due to business changes, property rights
changes and other reasons.
k) The user shall be informed of the end time of the device life cycle.
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.