CWE-289 使用候选名称进行的认证绕过

admin 2022年1月5日21:06:12CWE(弱点枚举)评论13 views2891字阅读9分38秒阅读模式

CWE-289 使用候选名称进行的认证绕过

Authentication Bypass by Alternate Name

结构: Simple

Abstraction: Variant

状态: Incomplete

被利用可能性: unkown

基本描述

The software performs authentication based on the name of a resource being accessed, or the name of the actor performing the access, but it does not properly check all possible names for that resource or actor.

相关缺陷

  • cwe_Nature: ChildOf cwe_CWE_ID: 287 cwe_View_ID: 1000 cwe_Ordinal: Primary

  • cwe_Nature: ChildOf cwe_CWE_ID: 287 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
Access Control Bypass Protection Mechanism

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.

分析过的案例

标识 说明 链接
CVE-2003-0317 Protection mechanism that restricts URL access can be bypassed using URL encoding. https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0317
CVE-2004-0847 Bypass of authentication for files using "" (backslash) or "%5C" (encoded backslash). https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0847

Notes

Relationship
Overlaps equivalent encodings, canonicalization, authorization, multiple trailing slash, trailing space, mixed case, and other equivalence issues.
Theoretical
Alternate names are useful in data driven manipulation attacks, not just for authentication.

分类映射

映射的分类名 ImNode ID Fit Mapped Node Name
PLOVER Authentication bypass by alternate name
The CERT Oracle Secure Coding Standard for Java (2011) IDS01-J CWE More Specific Normalize strings before validating them
SEI CERT Oracle Coding Standard for Java IDS01-J CWE More Specific Normalize strings before validating them

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  • 本文由 发表于 2022年1月5日21:06:12
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