CWE-606 循环条件输入未经检查
Unchecked Input for Loop Condition
结构: Simple
Abstraction: Base
状态: Draft
被利用可能性: unkown
基本描述
The product does not properly check inputs that are used for loop conditions, potentially leading to a denial of service because of excessive looping.
相关缺陷
-
cwe_Nature: ChildOf cwe_CWE_ID: 20 cwe_View_ID: 1000 cwe_Ordinal: Primary
-
cwe_Nature: ChildOf cwe_CWE_ID: 20 cwe_View_ID: 699 cwe_Ordinal: Primary
-
cwe_Nature: CanPrecede cwe_CWE_ID: 834 cwe_View_ID: 1000
常见的影响
| 范围 | 影响 | 注释 |
|---|---|---|
| Availability | DoS: Resource Consumption (CPU) |
可能的缓解方案
Implementation
策略:
Do not use user-controlled data for loop conditions.
Implementation
策略:
Perform input validation.
示例代码
例
The following example demonstrates the weakness.
bad C
void iterate(int n){
int i;
for (i = 0; i foo();
for (i = 0; i foo();
}
}
void iterateFoo()
{
unsigned int num;
scanf("%u",&num);
iterate(num);
scanf("%u",&num);
iterate(num);
}文章来源于互联网:scap中文网
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