CVE-2021-44731
Publication date 17 February 2022
Last updated 24 July 2024
Ubuntu priority
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 | ||
| 20.04 LTS focal |
Fixed 2.54.3+20.04
|
|
| 18.04 LTS bionic |
Fixed 2.54.3+18.04
|
|
| 16.04 LTS xenial |
Fixed 2.54.3+16.04~esm2
|
|
| 14.04 LTS trusty |
Fixed 2.54.3+14.04~esm1
|
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Get Ubuntu ProSeverity 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