CWE-641 文件和其他资源名称限制不恰当

Improper Restriction of Names for Files and Other Resources

结构: Simple

Abstraction: Base

状态: Incomplete

被利用可能性: Low

基本描述

The application constructs the name of a file or other resource using input from an upstream component, but it does not restrict or incorrectly restricts the resulting name.

扩展描述

This may produce resultant weaknesses. For instance, if the names of these resources contain scripting characters, it is possible that a script may get executed in the client's browser if the application ever displays the name of the resource on a dynamically generated web page. Alternately, if the resources are consumed by some application parser, a specially crafted name can exploit some vulnerability internal to the parser, potentially resulting in execution of arbitrary code on the server machine. The problems will vary based on the context of usage of such malformed resource names and whether vulnerabilities are present in or assumptions are made by the targeted technology that would make code execution possible.

相关缺陷

• cwe_Nature: ChildOf cwe_CWE_ID: 99 cwe_View_ID: 1000 cwe_Ordinal: Primary

• cwe_Nature: ChildOf cwe_CWE_ID: 99 cwe_View_ID: 699 cwe_Ordinal: Primary

适用平台

Language: {'cwe_Class': 'Language-Independent', 'cwe_Prevalence': 'Undetermined'}

常见的影响

范围	影响	注释
['Integrity', 'Confidentiality', 'Availability']	Execute Unauthorized Code or Commands	Execution of arbitrary code in the context of usage of the resources with dangerous names.
['Confidentiality', 'Availability']	['Read Application Data', 'DoS: Crash, Exit, or Restart']	Crash of the consumer code of these resources resulting in information leakage or denial of service.

可能的缓解方案

Architecture and Design

策略:

Do not allow users to control names of resources used on the server side.

Architecture and Design

策略:

Perform whitelist input validation at entry points and also before consuming the resources. Reject bad file names rather than trying to cleanse them.

Architecture and Design

策略:

Make sure that technologies consuming the resources are not vulnerable (e.g. buffer overflow, format string, etc.) in a way that would allow code execution if the name of the resource is malformed.

分类映射

映射的分类名	ImNode ID	Fit	Mapped Node Name
Software Fault Patterns	SFP24		Tainted input to command

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