CVE-2021-44730
Published: 17 February 2022
snapd 2.54.2 did not properly validate the location of the snap-confine binary. A local attacker who can hardlink this binary to another location to cause snap-confine to execute other arbitrary binaries 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
Priority
Status
| Package | Release | Status |
|---|---|---|
|
snapd Launchpad, Ubuntu, Debian |
bionic |
Released
(2.54.3+18.04)
|
| focal |
Released
(2.54.3+20.04)
|
|
| hirsute |
Ignored
(end of life)
|
|
| impish |
Released
(2.54.3+21.10.1)
|
|
| trusty |
Released
(2.54.3+14.04~esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
| upstream |
Released
(2.54.3)
|
|
| xenial |
Released
(2.54.3+16.04~esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
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 |