CWE-771 对活跃已分配资源丧失索引

Missing Reference to Active Allocated Resource

结构: Simple

Abstraction: Base

状态: Incomplete

被利用可能性: Medium

基本描述

The software does not properly maintain a reference to a resource that has been allocated, which prevents the resource from being reclaimed.

扩展描述

This does not necessarily apply in languages or frameworks that automatically perform garbage collection, since the removal of all references may act as a signal that the resource is ready to be reclaimed.

相关缺陷

• cwe_Nature: ChildOf cwe_CWE_ID: 400 cwe_View_ID: 699 cwe_Ordinal: Primary

• cwe_Nature: ChildOf cwe_CWE_ID: 400 cwe_View_ID: 1000 cwe_Ordinal: Primary

常见的影响

可能的缓解方案

MIT-47 ['Operation', 'Architecture and Design']

策略: Resource Limitation

Use resource-limiting settings provided by the operating system or environment. For example, when managing system resources in POSIX, setrlimit() can be used to set limits for certain types of resources, and getrlimit() can determine how many resources are available. However, these functions are not available on all operating systems. When the current levels get close to the maximum that is defined for the application (see CWE-770), then limit the allocation of further resources to privileged users; alternately, begin releasing resources for less-privileged users. While this mitigation may protect the system from attack, it will not necessarily stop attackers from adversely impacting other users. Ensure that the application performs the appropriate error checks and error handling in case resources become unavailable (CWE-703).

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