CVE-2022-3328
Published: 30 November 2022
Race condition in snap-confine's must_mkdir_and_open_with_perms()
From the Ubuntu Security Team
The Qualys Research Team discovered that a race condition existed in the snapd snap-confine binary when preparing the private /tmp mount for a snap. A local attacker could possibly use this issue to escalate privileges and execute arbitrary code.
Notes
| Author | Note |
|---|---|
| alexmurray | vuln introduced as part of the fix for CVE-2021-44731 - as such affects upstream versions 2.54.3 to 2.57.5 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
snapd Launchpad, Ubuntu, Debian |
bionic |
Released
(2.57.5+18.04ubuntu0.1)
|
| focal |
Released
(2.57.5+20.04ubuntu0.1)
|
|
| jammy |
Released
(2.57.5+22.04ubuntu0.1)
|
|
| kinetic |
Released
(2.57.5+22.10ubuntu0.1)
|
|
| lunar |
Not vulnerable
(2.58.2+23.04)
|
|
| trusty |
Ignored
(out of standard support)
|
|
| upstream |
Needs triage
|
|
| xenial |
Released
(2.54.3+16.04.0ubuntu0.1~esm5)
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| 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 |