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CWE-20 (输入验证不恰当) — Vulnerability Class 3377

3377 vulnerabilities classified as CWE-20 (输入验证不恰当). AI Chinese analysis included.

CWE-20 represents a critical software weakness where applications fail to properly verify the integrity, format, or type of incoming data before processing it. This oversight allows attackers to inject malicious payloads, such as SQL injection strings or cross-site scripting code, which can bypass security controls and compromise system integrity. Exploitation typically occurs when untrusted data from external sources, like user forms or network packets, is treated as executable code or trusted input. To mitigate this risk, developers must implement rigorous input validation strategies, including strict type checking, length constraints, and allow-listing acceptable characters. Additionally, employing parameterized queries and output encoding ensures that even if validation fails, the injected data remains inert, thereby preserving application security and preventing unauthorized execution or data exposure.

MITRE CWE Description
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Input validation is a frequently-used technique for checking potentially dangerous inputs in order to ensure that the inputs are safe for processing within the code, or when communicating with other components. Input can consist of: raw data - strings, numbers, parameters, file contents, etc. metadata - information about the raw data, such as headers or size Data can be simple or structured. Structured data can be composed of many nested layers, composed of combinations of metadata and raw data, with other simple or structured data. Many properties of raw data or metadata may need to be validated upon entry into the code, such as: specified quantities such as size, length, frequency, price, rate, number of operations, time, etc. implied or derived quantities, such as the actual size of a file instead of a specified size indexes, offsets, or positions into more complex data structures symbolic keys or other elements into hash tables, associative arrays, etc. well-formedness, i.e. syntactic correctness - compliance with expected syntax lexical token correctness - compliance with rules for what is treated as a token specified or derived type - the actual type of the input (or what the input appears to be) consistency - between individual data el…
Common Consequences (3)
AvailabilityDoS: Crash, Exit, or Restart, DoS: Resource Consumption (CPU), DoS: Resource Consumption (Memory)
An attacker could provide unexpected values and cause a program crash or arbitrary control of resource allocation, leading to excessive consumption of resources such as memory and CPU.
ConfidentialityRead Memory, Read Files or Directories
An attacker could read confidential data if they are able to control resource references.
Integrity, Confidentiality, AvailabilityModify Memory, Execute Unauthorized Code or Commands
An attacker could use malicious input to modify data or possibly alter control flow in unexpected ways, including arbitrary command execution.
Mitigations (5)
Architecture and DesignConsider using language-theoretic security (LangSec) techniques that characterize inputs using a formal language and build "recognizers" for that language. This effectively requires parsing to be a distinct layer that effectively enforces a boundary between raw input and internal data representations, instead of allowing parser code to be scattered throughout the program, where it could be subjec…
Architecture and DesignUse an input validation framework such as Struts or the OWASP ESAPI Validation API. Note that using a framework does not automatically address all input validation problems; be mindful of weaknesses that could arise from misusing the framework itself (CWE-1173).
Architecture and Design, ImplementationUnderstand all the potential areas where untrusted inputs can enter the product, including but not limited to: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may b…
ImplementationAssume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does. When performing input validation, consider all potentially relevant properties, including length, type of input, the full range…
Effectiveness: High
Architecture and DesignFor any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server. Even though clien…
Examples (2)
This example demonstrates a shopping interaction in which the user is free to specify the quantity of items to be purchased and a total is calculated.
... public static final double price = 20.00; int quantity = currentUser.getAttribute("quantity"); double total = price * quantity; chargeUser(total); ...
Bad · Java
This example asks the user for a height and width of an m X n game board with a maximum dimension of 100 squares.
... #define MAX_DIM 100 ... /* board dimensions */ int m,n, error; board_square_t *board; printf("Please specify the board height: \n"); error = scanf("%d", &m); if ( EOF == error ){ die("No integer passed: Die evil hacker!\n"); } printf("Please specify the board width: \n"); error = scanf("%d", &n); if ( EOF == error ){ die("No integer passed: Die evil hacker!\n"); } if ( m > MAX_DIM || n > MAX_DIM ) { die("Value too large: Die evil hacker!\n"); } board = (board_square_t*) malloc( m * n * sizeof(board_square_t)); ...
Bad · C
CVE IDTitleCVSSSeverityPublished
CVE-2023-0869 Cross-site scripting in outage/list.htm — Meridian 5.8 Medium2023-02-23
CVE-2022-48321 SSRF in agent-receiver API — Checkmk 6.8 Medium2023-02-20
CVE-2022-47909 LQL Injection in Livestatus HTTP headers — Checkmk 6.8 Medium2023-02-20
CVE-2022-46836 PHP code injection in watolib — Checkmk 9.1 Critical2023-02-20
CVE-2022-46303 Command injection in SMS notifications — Checkmk 8.0 High2023-02-20
CVE-2022-43929 IBM Db2 for Linux, UNIX and Windows denial of service — Db2 for Linux, UNIX and Windows 4.9 Medium2023-02-17
CVE-2023-21574 Adobe Photoshop Improper Input Validation Remote Code Execution Vulnerability — Photoshop 7.8 High2023-02-17
CVE-2023-21621 Adobe FrameMaker Improper Input Validation Remote Code Execution Vulnerability — FrameMaker 7.8 High2023-02-17
CVE-2023-22228 Adobe Bridge Improper Input Validation Remote Code Execution Vulnerability — Bridge 7.8 High2023-02-17
CVE-2023-22239 Adobe After Effects Improper Input Validation Remote Code Execution Vulnerability — After Effects 7.8 High2023-02-17
CVE-2023-24807 Undici vulnerable to Regular Expression Denial of Service in Headers — undici 7.5 High2023-02-16
CVE-2022-20952 Cisco Secure Web Appliance 输入验证错误漏洞 — Cisco Secure Web Appliance 5.3 Medium2023-02-16
CVE-2023-20009 Cisco Secure Email 代码问题漏洞 — Cisco Secure Email 6.5 Medium2023-02-16
CVE-2022-27892 Palantir Gotham included an endpoint that would log arbitrary sized payloads. — Gotham 5.3 Medium2023-02-16
CVE-2022-27897 Palantir Gotham included an endpoint that would log arbitrary sized zip files. — Gotham 5.3 Medium2023-02-16
CVE-2023-23934 Wrkzeug's incorrect parsing of nameless cookies leads to __Host- cookies bypass — werkzeug 2.6 Low2023-02-14
CVE-2023-21685 Microsoft WDAC OLE DB provider for SQL Server Remote Code Execution Vulnerability — Windows 10 Version 1809 8.8 High2023-02-14
CVE-2023-21818 Windows Secure Channel Denial of Service Vulnerability — Windows 10 Version 1809 7.5 High2023-02-14
CVE-2023-21816 Windows Active Directory Domain Services API Denial of Service Vulnerability — Windows 10 Version 1809 7.5 High2023-02-14
CVE-2023-22939 SPL Command Safeguards Bypass via the ‘map’ SPL Command in Splunk Enterprise — Splunk Enterprise 8.1 High2023-02-14
CVE-2023-22937 Unnecessary File Extensions Allowed by Lookup Table Uploads in Splunk Enterprise — Splunk Enterprise 4.3 Medium2023-02-14
CVE-2023-22935 SPL Command Safeguards Bypass via the ‘display.page.search.patterns.sensitivity’ Search Parameter in Splunk Enterprise — Splunk Enterprise 8.1 High2023-02-14
CVE-2023-22934 SPL Command Safeguards Bypass via the ‘pivot’ SPL Command in Splunk Enterprise — Splunk Enterprise 7.3 High2023-02-14
CVE-2023-22940 SPL Command Safeguards Bypass via the ‘collect’ SPL Command Aliases in Splunk Enterprise — Splunk Enterprise 6.3 Medium2023-02-14
CVE-2022-31808 Siemens SiPass Integrated 输入验证错误漏洞 — SiPass integrated AC5102 (ACC-G2) 7.8 High2023-02-14
CVE-2023-24816 set_term_title command injection in ipython — ipython 4.5 Medium2023-02-10
CVE-2023-24569 Dell Alienware Command Center 输入验证错误漏洞 — Alienware Command Center (AWCC) 7.8 High2023-02-10
CVE-2018-7935 Huawei E5573Cs-322 安全漏洞 — E5573Cs-322 5.3 -2023-02-10
CVE-2022-40502 Improper input validation in WLAN Host — Snapdragon 7.5 High2023-02-09
CVE-2022-34146 Improper input validation in WLAN Host — Snapdragon 7.5 High2023-02-09

Vulnerabilities classified as CWE-20 (输入验证不恰当) represent 3377 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.