CVE-2021-44730 snapd could be made to escalate privileges and run programs as administrator

2022-02-1722:15:18

CWE-59

canonical

www.cve.org

snapd

privilege escalation

vulnerability

version 2.54.2

fix

2.54.3+18.04

2.54.3+20.04

2.54.3+21.10.1

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

8.9

Confidence

High

EPSS

Percentile

5.1%

JSON

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

CNA Affected

[
  {
    "product": "snapd",
    "vendor": "Canonical Ltd.",
    "versions": [
      {
        "lessThanOrEqual": "2.54.2",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]