CVE-2021-44731 snapd could be made to escalate privileges and run programs as administrator

2022-02-1700:00:00

CWE-362

canonical

www.cve.org

privilege escalation

snapd

race condition

cve-2021-44731

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

8.6

Confidence

High

EPSS

0.001

Percentile

17.3%

JSON

A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap’s private mount namespace and causing snap-confine to execute arbitrary code 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

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