CVE-2021-44731
snapd could be made to escalate privileges and run programs as administrator
- State
- Published
- Severity
- 7.8 High
- Published
- Feb 17, 2022
- Updated
- Aug 4, 2024
- Reserved
- Dec 8, 2021
Description
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
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.8 High | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H | canonical |
Weaknesses
- CWE-362 Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Affected Products
| Product | Versions |
|---|---|
snapdCanonical Ltd. |
|
References
- https://ubuntu.com/security/notices/USN-5292-1
- [oss-security] 20220218 CVE-2021-4120: Insufficient validation of snap content interface and layout pathsmailing-list
- FEDORA-2022-82bea71e5avendor-advisory
- FEDORA-2022-5df8b52ba4vendor-advisory
- DSA-5080vendor-advisory
- [oss-security] 20220223 Re: CVE-2021-44731: Race condition in snap-confine's setup_private_mount()mailing-list
- [oss-security] 20220223 Re: CVE-2021-44731: Race condition in snap-confine's setup_private_mount()mailing-list
- [oss-security] 20221130 Race condition in snap-confine's must_mkdir_and_open_with_perms() (CVE-2022-3328)mailing-list
- 20221208 Race condition in snap-confine's must_mkdir_and_open_with_perms() (CVE-2022-3328)mailing-list
- http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.