CWE-455 初始化失效后的不存在变量
Non-exit on Failed Initialization
结构: Simple
Abstraction: Base
状态: Draft
被利用可能性: unkown
基本描述
The software does not exit or otherwise modify its operation when security-relevant errors occur during initialization, such as when a configuration file has a format error, which can cause the software to execute in a less secure fashion than intended by the administrator.
相关缺陷
-
cwe_Nature: ChildOf cwe_CWE_ID: 705 cwe_View_ID: 1000 cwe_Ordinal: Primary
-
cwe_Nature: ChildOf cwe_CWE_ID: 636 cwe_View_ID: 1000
适用平台
Language: {'cwe_Class': 'Language-Independent', 'cwe_Prevalence': 'Undetermined'}
常见的影响
| 范围 | 影响 | 注释 |
|---|---|---|
| ['Integrity', 'Other'] | ['Modify Application Data', 'Alter Execution Logic'] | The application could be placed in an insecure state that may allow an attacker to modify sensitive data or allow unintended logic to be executed. |
可能的缓解方案
Implementation
策略:
Follow the principle of failing securely when an error occurs. The system should enter a state where it is not vulnerable and will not display sensitive error messages to a potential attacker.
示例代码
例
The following code intends to limit certain operations to the administrator only.
bad Perl
$state = GetStateData($username);
if (defined($state)) {
}
# do stuff
if ($uid == 0) {
}
If the application is unable to extract the state information - say, due to a database timeout - then the $uid variable will not be explicitly set by the programmer. This will cause $uid to be regarded as equivalent to "0" in the conditional, allowing the original user to perform administrator actions. Even if the attacker cannot directly influence the state data, unexpected errors could cause incorrect privileges to be assigned to a user just by accident.
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 | Non-exit on Failed Initialization |
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