What is CVE-2021-3155?

CVE-2021-3155 is a low-severity vulnerability in Canonical Ltd. Snapd, classified under Incorrect Default Permissions. CVSS score: 3.8/10. Published 2022-02-17.

How severe is CVE-2021-3155?

Low severity. CVSS v3 base score is 3.8 out of 10.

Is CVE-2021-3155 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Canonical Ltd. Snapd

CVE-2021-3155

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…

EPSS: 0.003 (17.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.8 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.

Affected products

Canonical Ltd. Snapd — versions unspecified
Canonical Snapd
Canonical Ubuntu_linux — versions 18.04, 20.04, 21.10

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

security@ubuntu.com (Patch, x_refsource_MISC, Vendor Advisory)
security@ubuntu.com (Patch, Third Party Advisory, x_refsource_MISC)
security@ubuntu.com (Patch, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-3155?: CVE-2021-3155 is a low-severity vulnerability in Canonical Ltd. Snapd, classified under Incorrect Default Permissions. CVSS score: 3.8/10. Published 2022-02-17.
How severe is CVE-2021-3155?: Low severity. CVSS v3 base score is 3.8 out of 10.
Is CVE-2021-3155 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.