snapd could be made to escalate privileges and run programs as administrator

A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap's private mount namespace and causing snap-confine to execute arbitrary code and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

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

使用共享资源的并发执行不恰当同步问题(竞争条件)

Snapd 竞争条件问题漏洞

Snapd是开源的一个跨平台的包管理工具。 snapd 2.54.2版本存在竞争条件问题漏洞，该漏洞源于当为snap准备私有挂载命名空间时，snap2.54.2 snap- restricted二进制文件中存在一个竞争条件。这可能允许本地攻击者可利用该漏洞通过在snap的私有挂载名称空间中绑定挂载自己的内容，从而获得根权限，并执行任意代码，从而获得权限升级。

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