CVE-2021-3155 - CVE House
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Status published Low CVE-2021-3155

snapd created ~/snap with too-wide permissions

Vulnerability Description

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

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • James Troup

References

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Affected Vendor

Canonical Ltd.

View all reports →

Affected Software

snapd
Vulnerable Versions:
unspecified

Timeline

Official Publish: February 17th, 2022
Last Modified: August 3rd, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Weaknesses (CWE)

CWE-276

MITRE ATT&CK TTPs

T1222 File and Directory Permissions Modification
Defense Evasion
T1078 Valid Accounts
Persistence
T1574 Hijack Execution Flow
Privilege Escalation
T1021 Remote Services
Lateral Movement
T1005 Data from Local System
Collection