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CVE-2021-44731

Publication date 17 February 2022

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

7.8 · High

Score breakdown

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

Status

Package Ubuntu Release Status
snapd 21.10 impish
Fixed 2.54.3+21.10.1
21.04 hirsute Ignored end of life
20.04 LTS focal
Fixed 2.54.3+20.04
18.04 LTS bionic
Fixed 2.54.3+18.04
16.04 LTS xenial
14.04 LTS trusty

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Severity score breakdown

Parameter Value
Base score 7.8 · High
Attack vector Local
Attack complexity High
Privileges required Low
User interaction None
Scope Changed
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

    • USN-5292-1
    • snapd vulnerabilities
    • 17 February 2022
    • USN-5292-2
    • snapd vulnerabilities
    • 18 February 2022
    • USN-5292-3
    • snapd vulnerabilities
    • 18 February 2022

Other references