CWE-408 不正确的行为次序：早期放大攻击

Incorrect Behavior Order: Early Amplification

结构: Simple

Abstraction: Base

状态: Draft

被利用可能性: unkown

基本描述

The software allows an entity to perform a legitimate but expensive operation before authentication or authorization has taken place.

相关缺陷

  • cwe_Nature: ChildOf cwe_CWE_ID: 405 cwe_View_ID: 1000

  • cwe_Nature: ChildOf cwe_CWE_ID: 405 cwe_View_ID: 699 cwe_Ordinal: Primary

  • cwe_Nature: ChildOf cwe_CWE_ID: 696 cwe_View_ID: 1000 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
Availability ['DoS: Amplification', 'DoS: Crash, Exit, or Restart', 'DoS: Resource Consumption (CPU)', 'DoS: Resource Consumption (Memory)'] System resources, CPU and memory, can be quickly consumed. This can lead to poor system performance or system crash.

示例代码

例

This data prints the contents of a specified file requested by a user.

bad PHP

function printFile($username,$filename){

//read file into string
$file = file_get_contents($filename);
if ($file && isOwnerOf($username,$filename)){
echo $file;
return true;
}
else{
echo 'You are not authorized to view this file';
}
return false;
}

This code first reads a specified file into memory, then prints the file if the user is authorized to see its contents. The read of the file into memory may be resource intensive and is unnecessary if the user is not allowed to see the file anyway.

分析过的案例

标识 说明 链接

Notes

分类映射

映射的分类名 ImNode ID Fit Mapped Node Name
PLOVER Early Amplification