CWE-178 大小写敏感处理不恰当

Improper Handling of Case Sensitivity

结构: Simple

Abstraction: Base

状态: Incomplete

被利用可能性: unkown

基本描述

The software does not properly account for differences in case sensitivity when accessing or determining the properties of a resource, leading to inconsistent results.

扩展描述

Improperly handled case sensitive data can lead to several possible consequences, including:

相关缺陷

• cwe_Nature: ChildOf cwe_CWE_ID: 706 cwe_View_ID: 1000 cwe_Ordinal: Primary

• cwe_Nature: ChildOf cwe_CWE_ID: 706 cwe_View_ID: 1003 cwe_Ordinal: Primary

• cwe_Nature: CanPrecede cwe_CWE_ID: 433 cwe_View_ID: 1000

• cwe_Nature: CanPrecede cwe_CWE_ID: 289 cwe_View_ID: 1000

适用平台

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

常见的影响

可能的缓解方案

MIT-44 Architecture and Design

策略: Input Validation

Avoid making decisions based on names of resources (e.g. files) if those resources can have alternate names.

MIT-5 Implementation

策略: Input Validation

Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a whitelist 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 of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
Do not rely exclusively on looking for malicious or malformed inputs (i.e., do not rely on a blacklist). A blacklist is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, blacklists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.

MIT-20 Implementation

策略: Input Validation

Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass whitelist validation schemes by introducing dangerous inputs after they have been checked.

示例代码

例

In the following example, an XSS neutralization method replaces script tags in user supplied input with a safe equivalent:

bad Java

The code only works when the "script" tag is in all lower-case, forming an incomplete blacklist (CWE-184). Equivalent tags such as "SCRIPT" or "ScRiPt" will not be neutralized by this method, allowing an XSS attack.

分析过的案例

Notes

分类映射

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