CWE-771

アクティブな割り当てリソースへの参照がない

Missing Reference to Active Allocated Resource

脆弱性作成中

日本語説明

この製品は、割り当て済みのリソースへの参照を適切に保持していないため、リソースを再要求できません。

これは、ガベージコレクションを自動的に実行する言語やフレームワークでは必ずしも当てはまらない。なぜなら、すべての参照を削除することは、リソースを取り戻す準備ができたというシグナルとして機能するかもしれないからだ。

原文 (English)

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

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.

関連する脆弱性

想定される影響

Scope: Availability / Impact: DoS: Resource Consumption (Other)

対策・緩和策

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).

外部リンク

MITRE公式ページ — CWE-771