CVE-2020-27352

2024-06-2120:06:37

canonical

github.com

snapd

docker

systemd

vulnerability

privilege escalation

CVSS3

9.3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

AI Score

7.1

Confidence

Low

SSVC

Exploitation

none

Automatable

Technical Impact

total

JSON

When generating the systemd service units for the docker snap (and other similar snaps), snapd does not specify Delegate=yes - as a result systemd will move processes from the containers created and managed by these snaps into the cgroup of the main daemon within the snap itself when reloading system units. This may grant additional privileges to a container within the snap that were not originally intended.

ADP Affected

[
  {
    "cpes": [
      "cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*"
    ],
    "vendor": "canonical",
    "product": "snapd",
    "versions": [
      {
        "status": "affected",
        "version": "0",
        "lessThan": "2.48.3",
        "versionType": "custom"
      }
    ],
    "defaultStatus": "unknown"
  }
]