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CWE-284 (访问控制不恰当) — Vulnerability Class 2612

2612 vulnerabilities classified as CWE-284 (访问控制不恰当). AI Chinese analysis included.

CWE-284 represents a critical security weakness where software fails to properly restrict access to sensitive resources, allowing unauthorized actors to interact with data or functions they should not reach. This flaw typically arises when developers neglect to implement robust authentication or authorization checks, enabling attackers to bypass security controls through direct URL manipulation, token forgery, or privilege escalation techniques. Exploitation often leads to severe consequences, including data breaches, unauthorized system modifications, or complete service disruption. To mitigate this risk, developers must enforce strict access control policies at every layer of the application architecture. This involves implementing comprehensive identity verification, applying the principle of least privilege, and rigorously validating user permissions before granting access to any protected resource, ensuring that only authenticated and authorized users can perform specific actions.

MITRE CWE Description
The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Access control involves the use of several protection mechanisms such as: Authentication (proving the identity of an actor) Authorization (ensuring that a given actor can access a resource), and Accountability (tracking of activities that were performed) When any mechanism is not applied or otherwise fails, attackers can compromise the security of the product by gaining privileges, reading sensitive information, executing commands, evading detection, etc. There are two distinct behaviors that can introduce access control weaknesses: Specification: incorrect privileges, permissions, ownership, etc. are explicitly specified for either the user or the resource (for example, setting a password file to be world-writable, or giving administrator capabilities to a guest user). This action could be performed by the program or the administrator. Enforcement: the mechanism contains errors that prevent it from properly enforcing the specified access control requirements (e.g., allowing the user to specify their own privileges, or allowing a syntactically-incorrect ACL to produce insecure settings). This problem occurs within the program itself, in that it does not actually enforce the intended security policy that the administrator specifies.
Common Consequences (1)
Other Varies by Context
Mitigations (2)
Architecture and Design, Operation Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
Architecture and Design Compartmentalize the system to have "safe" areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area. Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separatio…
Examples (2)
This code temporarily raises the program's privileges to allow creation of a new user folder.
def makeNewUserDir(username): if invalidUsername(username): #avoid CWE-22 and CWE-78 print('Usernames cannot contain invalid characters') return False try: raisePrivileges() os.mkdir('/home/' + username) lowerPrivileges() except OSError: print('Unable to create new user directory for user:' + username) return False return True
Bad · Python
This function runs an arbitrary SQL query on a given database, returning the result of the query.
function runEmployeeQuery($dbName, $name){ mysql_select_db($dbName,$globalDbHandle) or die("Could not open Database".$dbName); //Use a prepared statement to avoid CWE-89 $preparedStatement = $globalDbHandle->prepare('SELECT * FROM employees WHERE name = :name'); $preparedStatement->execute(array(':name' => $name)); return $preparedStatement->fetchAll(); } /.../ $employeeRecord = runEmployeeQuery('EmployeeDB',$_GET['EmployeeName']);
Bad · PHP
CVE ID Title CVSS Severity Published
CVE-2021-40414 Reolink Rlc-410W 访问控制错误漏洞 — n/a 7.1 - 2022-01-28
CVE-2021-40404 Reolink Rlc-410W 授权问题漏洞 — n/a 9.8 - 2022-01-28
CVE-2022-0203 Improper Access Control in crater-invoice/crater — crater-invoice/crater 4.3 - 2022-01-26
CVE-2022-0270 Improper header sanitization in bored-agent causes escalation of privilege — bored-agent 8.8 High 2022-01-25
CVE-2021-23233 Fresenius Kabi Agilia Connect Infusion System — Agilia Link+ 7.3 High 2022-01-21
CVE-2021-4016 Rapid7 Insight Agent Improper Access Control — Insight Agent 4.0 Medium 2022-01-21
CVE-2021-34402 Nvidia NVIDIA Shield TV 缓冲区错误漏洞 — SHIELD TV 6.7 Medium 2022-01-18
CVE-2021-34401 Nvidia NVIDIA Shield TV 访问控制错误漏洞 — SHIELD TV 7.8 High 2022-01-18
CVE-2021-37864 Users can view the contents of an archived channel when access is explicitly denied by the system admin — Mattermost 2.6 Low 2022-01-18
CVE-2021-28507 An issue has recently been discovered in Arista EOS where, under certain conditions, the service ACL configured for OpenConfig gNOI and OpenConfig RESTCONF might be bypassed, which results in the denied requests being forwarded to the agent. — EOS 5.5 Medium 2022-01-14
CVE-2022-23134 Possible view of the setup pages by unauthenticated users if config file already exists — Frontend 3.7 Low 2022-01-13
CVE-2022-23132 Incorrect permissions of [/var/run/zabbix] forces dac_override — Proxy, Server 3.3 Low 2022-01-13
CVE-2022-0170 Improper Access Control in chocobozzz/peertube — chocobozzz/peertube 4.3 - 2022-01-11
CVE-2021-45034 Siemens SICAM A8000 CP-8000 日志信息泄露漏洞 — CP-8000 MASTER MODULE WITH I/O -25/+70°C 6.5 - 2022-01-11
CVE-2021-23173 ICSMA-22-006-01 Philips Engage Software — Engage Software 2.6 Low 2022-01-07
CVE-2022-0133 Improper Access Control in chocobozzz/peertube — chocobozzz/peertube 4.3 - 2022-01-07
CVE-2021-4194 Improper Access Control in bookstackapp/bookstack — bookstackapp/bookstack 7.1 - 2022-01-06
CVE-2021-22567 Bidirectional Override in Dart SDK — Dart SDK 4.6 Medium 2022-01-05
CVE-2021-25991 ifme - Improper Access Control leads to admin deactivation — ifme 5.7 Medium 2021-12-29
CVE-2021-20050 SonicWALL SMA100 安全漏洞 — SonicWall SMA100 7.5 - 2021-12-23
CVE-2021-42808 The Sentinel Protection Installer 7.7.0 creates files and directory with all privileges granting any user full permissions. — Sentinel Protection Installer 6.5 Medium 2021-12-20
CVE-2021-36888 WordPress Image Hover Effects Ultimate plugin <= 9.6.1 - Unauthenticated Arbitrary Options Update leading to full website compromise — Image Hover Effects Ultimate (WordPress plugin) 9.8 Critical 2021-12-15
CVE-2021-4119 Improper Access Control in bookstackapp/bookstack — bookstackapp/bookstack 7.1 - 2021-12-15
CVE-2021-24859 User Meta Shortcodes <= 0.5 - Contributor+ Unauthorized Arbitrary User Metadata Access — User meta shortcodes 4.3 - 2021-12-13
CVE-2021-24845 Improved Include Page <= 1.2 - Contributor+ Arbitrary Posts/Pages Access — Improved Include Page 6.5 - 2021-12-13
CVE-2021-4089 Improper Access Control in snipe/snipe-it — snipe/snipe-it 5.4 - 2021-12-10
CVE-2021-22565 Insufficient Granularity of Access Control in GAEN Notification Server — Google Exposure-notifications-verification-server 6.5 Medium 2021-12-09
CVE-2021-42124 Ivanti Avalanche 安全漏洞 — Ivanti Avalanche 8.8 - 2021-12-07
CVE-2021-35245 Broken Access Control Vulnerability for SolarWinds Serv-U — Serv-U FTP 8.4 High 2021-12-06
CVE-2021-26334 AMD Chipset Driver Information Disclosure Vulnerability — μProf Tool 9.9 - 2021-12-01

Vulnerabilities classified as CWE-284 (访问控制不恰当) represent 2612 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.