CVE-2021-3155 snapd created ~/snap with too-wide permissions

2022-02-1722:15:16

CWE-276

canonical

www.cve.org

cve-2021-3155

snapd

directory permissions

CVSS3

3.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

6.8

Confidence

High

EPSS

Percentile

5.1%

JSON

snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. 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"
      }
    ]
  }
]