CWE-627 动态变量执行

Dynamic Variable Evaluation

结构: Simple

Abstraction: Base

状态: Incomplete

被利用可能性: unkown

基本描述

In a language where the user can influence the name of a variable at runtime, if the variable names are not controlled, an attacker can read or write to arbitrary variables, or access arbitrary functions.

扩展描述

The resultant vulnerabilities depend on the behavior of the application, both at the crossover point and in any control/data flow that is reachable by the related variables or functions.

相关缺陷

• cwe_Nature: ChildOf cwe_CWE_ID: 914 cwe_View_ID: 1000 cwe_Ordinal: Primary

• cwe_Nature: ChildOf cwe_CWE_ID: 914 cwe_View_ID: 699 cwe_Ordinal: Primary

• cwe_Nature: PeerOf cwe_CWE_ID: 183 cwe_View_ID: 1000

适用平台

Language: [{'cwe_Name': 'PHP', 'cwe_Prevalence': 'Undetermined'}, {'cwe_Name': 'Perl', 'cwe_Prevalence': 'Undetermined'}]

常见的影响

可能的缓解方案

Implementation

策略: Refactoring

Refactor the code to avoid dynamic variable evaluation whenever possible.

Implementation

策略: Input Validation

Use only whitelists of acceptable variable or function names.

Implementation

策略:

For function names, ensure that you are only calling functions that accept the proper number of arguments, to avoid unexpected null arguments.

分析过的案例

Notes

引用

• REF-517 Dynamic Evaluation Vulnerabilities in PHP applications

• REF-518 A Study In Scarlet: Exploiting Common Vulnerabilities in PHP Applications

文章来源于互联网:scap中文网