5.5

CVE-2021-3155: canonical ltd. snapd Incorrect Default Permissions

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2021-3155DEBIAN-CVE-2021-3155
Published 17-02-2022Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-3155 is a medium (CVSS 5.5) Incorrect Default Permissions vulnerability in canonical ltd. snapd. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 16.5% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.26%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
USN-5292-1USN-5292-2USN-5292-3

Timeline

  1. 17-02-2022
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

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

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

17%

Versus all other CVEs

30-day change

0.00 pp

From 0.26% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.26%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Canonical2 products
Canonical ltd.1 product
  • snapd≥ unspecified, ≤ 2.54.2
Debian1 product
  • snapd< 2.54-1
Ubuntu1 product
  • snapd< 2.54.3+16.04~esm2 | < 2.54.3+18.04 | < 2.54.3+20.04.1

4 vendors · 5 products

References

8 links