snapd non-regular file indefinite blocking read

In snapd versions prior to 2.62, snapd failed to properly check the file type when extracting a snap. The snap format is a squashfs file-system image and so can contain files that are non-regular files (such as pipes or sockets etc). Various file entries within the snap squashfs image (such as icons etc) are directly read by snapd when it is extracted. An attacker who could convince a user to install a malicious snap which contained non-regular files at these paths could then cause snapd to block indefinitely trying to read from such files and cause a denial of service.

CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:N/A:H

输入验证不恰当

snapd 安全漏洞

snapd是snapcore开源的一个跨平台的包管理工具。使系统能够使用.snap文件。 snapd 2.62之前版本存在安全漏洞，该漏洞源于未能正确检查文件类型。攻击者利用该漏洞可能导致拒绝服务。

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