CWE-266 特权授予不正确
Incorrect Privilege Assignment
结构: Simple
Abstraction: Base
状态: Draft
被利用可能性: unkown
基本描述
A product incorrectly assigns a privilege to a particular actor, creating an unintended sphere of control for that actor.
相关缺陷
-
cwe_Nature: ChildOf cwe_CWE_ID: 269 cwe_View_ID: 1000 cwe_Ordinal: Primary
-
cwe_Nature: CanAlsoBe cwe_CWE_ID: 286 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 |
|---|---|---|
| Access Control | Gain Privileges or Assume Identity | A user can access restricted functionality and/or sensitive information that may include administrative functionality and user accounts. |
可能的缓解方案
MIT-1 ['Architecture and Design', 'Operation']
策略:
Very carefully manage the setting, management, and handling of privileges. Explicitly manage trust zones in the software.
MIT-17 ['Architecture and Design', 'Operation']
策略: Environment Hardening
Run your code using the lowest privileges that are required to accomplish the necessary tasks [REF-76]. If possible, create isolated accounts with limited privileges that are only used for a single task. That way, a successful attack will not immediately give the attacker access to the rest of the software or its environment. For example, database applications rarely need to run as the database administrator, especially in day-to-day operations.
示例代码
例
Evidence of privilege change:
bad C
/ do some stuff /
seteuid(getuid());
bad Java
// privileged code goes here, for example:
System.loadLibrary("awt");
return null;
// nothing to return
}
例
This application sends a special intent with a flag that allows the receiving application to read a data file for backup purposes.
bad Java
intent.setAction("com.example.BackupUserData");
intent.setData(file_uri);
intent.addFlags(FLAG_GRANT_READ_URI_PERMISSION);
sendBroadcast(intent);
attack Java
public void onReceive(Context context, Intent intent) {
stealUserData(userData);
}
}
Any malicious application can register to receive this intent. Because of the FLAG_GRANT_READ_URI_PERMISSION included with the intent, the malicious receiver code can read the user's data.
分析过的案例
| 标识 | 说明 | 链接 |
|---|---|---|
| CVE-1999-1193 | untrusted user placed in unix "wheel" group | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-1193 |
| CVE-2005-2741 | Product allows users to grant themselves certain rights that can be used to escalate privileges. | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2741 |
| CVE-2005-2496 | Product uses group ID of a user instead of the group, causing it to run with different privileges. This is resultant from some other unknown issue. | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-2496 |
| CVE-2004-0274 | Product mistakenly assigns a particular status to an entity, leading to increased privileges. | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0274 |
分类映射
| 映射的分类名 | ImNode ID | Fit | Mapped Node Name |
|---|---|---|---|
| PLOVER | Incorrect Privilege Assignment | ||
| The CERT Oracle Secure Coding Standard for Java (2011) | SEC00-J | Do not allow privileged blocks to leak sensitive information across a trust boundary | |
| The CERT Oracle Secure Coding Standard for Java (2011) | SEC01-J | Do not allow tainted variables in privileged blocks |
引用
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