CWE-142 值分隔符转义处理不恰当

admin 2022年1月7日02:54:19CWE(弱点枚举)评论10 views2959字阅读9分51秒阅读模式

CWE-142 值分隔符转义处理不恰当

Improper Neutralization of Value Delimiters

结构: Simple

Abstraction: Variant

状态: Draft

被利用可能性: unkown

基本描述

The software receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could be interpreted as value delimiters when they are sent to a downstream component.

扩展描述

As data is parsed, an injected/absent/malformed delimiter may cause the process to take unexpected actions.

相关缺陷

  • cwe_Nature: ChildOf cwe_CWE_ID: 140 cwe_View_ID: 1000 cwe_Ordinal: Primary

  • cwe_Nature: ChildOf cwe_CWE_ID: 140 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 Unexpected State

可能的缓解方案

策略:

Developers should anticipate that value delimiters will be injected/removed/manipulated in the input vectors of their software system. Use an appropriate combination of black lists and whitelists to ensure only valid, expected and appropriate input is processed by the system.

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-28 Implementation

策略: Output Encoding

While it is risky to use dynamically-generated query strings, code, or commands that mix control and data together, sometimes it may be unavoidable. Properly quote arguments and escape any special characters within those arguments. The most conservative approach is to escape or filter all characters that do not pass an extremely strict whitelist (such as everything that is not alphanumeric or white space). If some special characters are still needed, such as white space, wrap each argument in quotes after the escaping/filtering step. Be careful of argument injection (CWE-88).

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

分类映射

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

引用

文章来源于互联网:scap中文网

特别标注: 本站(CN-SEC.COM)所有文章仅供技术研究,若将其信息做其他用途,由用户承担全部法律及连带责任,本站不承担任何法律及连带责任,请遵守中华人民共和国安全法.
  • 我的微信
  • 微信扫一扫
  • weinxin
  • 我的微信公众号
  • 微信扫一扫
  • weinxin
admin
  • 本文由 发表于 2022年1月7日02:54:19
  • 转载请保留本文链接(CN-SEC中文网:感谢原作者辛苦付出):
                  CWE-142 值分隔符转义处理不恰当 http://cn-sec.com/archives/612679.html

发表评论

匿名网友 填写信息

:?: :razz: :sad: :evil: :!: :smile: :oops: :grin: :eek: :shock: :???: :cool: :lol: :mad: :twisted: :roll: :wink: :idea: :arrow: :neutral: :cry: :mrgreen: