CVE-2021-4115
説明
There is a flaw in polkit which can allow an unprivileged user to cause polkit to crash, due to process file descriptor exhaustion. The highest threat from this vulnerability is to availability. NOTE: Polkit process outage duration is tied to the failing process being reaped and a new one being spawned.
CVSS (Common Vulnerability Scoring System) のスコアの詳細
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 スコアの内訳
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| ベーススコア | 6.2 | 5.5 | N/A |
| 攻撃ベクトル | Local | Local | N/A |
| 攻撃の複雑さ | Low | Low | N/A |
| 必要な権限 | None | Low | N/A |
| ユーザー関与レベル | None | None | N/A |
| 範囲 | Unchanged | Unchanged | N/A |
| 機密性 | None | None | N/A |
| 完全性への影響 | None | None | N/A |
| 可用性への影響 | High | High | N/A |
ベクトル
Red Hat: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
脆弱性の原因 (CWE) の理解
Confidentiality,Integrity
Technical Impact: Read Application Data; Modify Application Data
謝辞
Red Hat would like to thank Kevin Backhouse for reporting this issue.
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