CWE-648 特权API的不正确使用

Incorrect Use of Privileged APIs

结构: Simple

Abstraction: Base

状态: Incomplete

被利用可能性: Low

基本描述

The application does not conform to the API requirements for a function call that requires extra privileges. This could allow attackers to gain privileges by causing the function to be called incorrectly.

扩展描述

When an application contains certain functions that perform operations requiring an elevated level of privilege, the caller of a privileged API must be careful to:

If the caller of the API does not follow these requirements, then it may allow a malicious user or process to elevate their privilege, hijack the process, or steal sensitive data.

For instance, it is important to know if privileged APIs do not shed their privileges before returning to the caller or if the privileged function might make certain assumptions about the data, context or state information passed to it by the caller. It is important to always know when and how privileged APIs can be called in order to ensure that their elevated level of privilege cannot be exploited.

相关缺陷

• cwe_Nature: ChildOf cwe_CWE_ID: 269 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
Access Control	Gain Privileges or Assume Identity	An attacker may be able to elevate privileges.
Confidentiality	Read Application Data	An attacker may be able to obtain sensitive information.
['Integrity', 'Confidentiality', 'Availability']	Execute Unauthorized Code or Commands	An attacker may be able to execute code.

可能的缓解方案

Implementation

策略:

Before calling privileged APIs, always ensure that the assumptions made by the privileged code hold true prior to making the call.

Architecture and Design

策略:

Know architecture and implementation weaknesses of the privileged APIs and make sure to account for these weaknesses before calling the privileged APIs to ensure that they can be called safely.

Implementation

策略:

If privileged APIs make certain assumptions about data, context or state validity that are passed by the caller, the calling code must ensure that these assumptions have been validated prior to making the call.

Implementation

策略:

If privileged APIs do not shed their privilege prior to returning to the calling code, then calling code needs to shed these privileges immediately and safely right after the call to the privileged APIs. In particular, the calling code needs to ensure that a privileged thread of execution will never be returned to the user or made available to user-controlled processes.

Implementation

策略:

Only call privileged APIs from safe, consistent and expected state.

Implementation

策略:

Ensure that a failure or an error will not leave a system in a state where privileges are not properly shed and privilege escalation is possible (i.e. fail securely with regards to handling of privileges).

分析过的案例

标识	说明	链接

相关攻击模式

• CAPEC-107
• CAPEC-234