CWE-76 等价特殊元素的转义处理不恰当

Improper Neutralization of Equivalent Special Elements

结构: Simple

Abstraction: Base

状态: Draft

被利用可能性: High

基本描述

The software properly neutralizes certain special elements, but it improperly neutralizes equivalent special elements.

扩展描述

The software may have a fixed list of special characters it believes is complete. However, there may be alternate encodings, or representations that also have the same meaning. For example, the software may filter out a leading slash (/) to prevent absolute path names, but does not account for a tilde (~) followed by a user name, which on some *nix systems could be expanded to an absolute pathname. Alternately, the software might filter a dangerous "-e" command-line switch when calling an external program, but it might not account for "--exec" or other switches that have the same semantics.

相关缺陷

• cwe_Nature: ChildOf cwe_CWE_ID: 75 cwe_View_ID: 1000 cwe_Ordinal: Primary

• cwe_Nature: ChildOf cwe_CWE_ID: 75 cwe_View_ID: 699 cwe_Ordinal: Primary

适用平台

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

常见的影响

可能的缓解方案

Requirements

策略:

Programming languages and supporting technologies might be chosen which are not subject to these issues.

Implementation

策略:

Utilize an appropriate mix of whitelist and blacklist parsing to filter equivalent special element syntax from all input.

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