CVE-2021-3996

描述

A logic error was found in the libmount library of util-linux in the function that allows an unprivileged user to unmount a FUSE filesystem. This flaw allows a local user on a vulnerable system to unmount other users' filesystems that are either world-writable themselves (like /tmp) or mounted in a world-writable directory. An attacker may use this flaw to cause a denial of service to applications that use the affected filesystems.

如何修補 CVE-2021-3996

要修補 CVE-2021-3996,請將受影響套件升級到下列已修補版本。

• —升級至 2.37.3-r0 或更新版本

CVE-2021-3996 正在被利用嗎?

低 — EPSS 為 0.6%,目前沒有觀察到大規模利用活動。

受影響套件(1)

• >= 2.34, < 2.37.3-r0

CVSS 分數

參考連結(1)

• ADVISORYsecurity.alpinelinux.org/vuln/CVE-2021-3996