Is CVE-2021-3155 in the CISA KEV catalog?

No. CVE-2021-3155 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3155?

CVE-2021-3155 has a CVSS v3 base score of 3.8 (LOW).

What is the EPSS score for CVE-2021-3155?

CVE-2021-3155 has an EPSS score of 0.26% (17th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3155?

Upgrade snapd on debian 12 to 2.54-1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3155

LOW

3.8

CVSS v3

NVD

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

CWE-276

How to fix

Remediation Available

snapdDebian

Fixed in:2.54-1CVE-2021-3155

snap-confineUbuntu

Fixed in:2.54.3+14.04~esm1USN-5292-3

Fixed in:2.54.3+16.04~esm2USN-5292-3

Fixed in:2.54.3+18.04USN-5292-1

Fixed in:2.54.3+20.04.1USN-5292-2

Fixed in:2.54.3+20.04USN-5292-1

snapdUbuntu

Fixed in:2.54.3+14.04~esm1USN-5292-3

Fixed in:2.54.3+16.04~esm2USN-5292-3

Fixed in:2.54.3+18.04USN-5292-1

Fixed in:2.54.3+20.04USN-5292-1

Fixed in:2.54.3+20.04.1USN-5292-2

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.26%probability of exploitation in 30 days

17thpercentile

Low risk: more likely to be exploited than 17% of all known CVEs.

References

Patch3

Related Vulnerabilities

Other CWE-276 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2013-0632	Critical	9.8	94%	KEV	-
CVE-2017-11610	High	8.8	88%	-	Fix
CVE-2023-29919	Critical	9.1	60%	-	-
CVE-2019-17124	Critical	9.8	23%	-	-
CVE-2020-12608	High	7.8	22%	-	Fix
CVE-2021-3437	Critical	9.8	16%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.