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 |