Is CVE-2020-12401 in the CISA KEV catalog?

No. CVE-2020-12401 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-12401?

CVE-2020-12401 has a CVSS v3 base score of 4.7 (MEDIUM).

What is the EPSS score for CVE-2020-12401?

CVE-2020-12401 has an EPSS score of 0.32% (24th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-12401?

Upgrade firefox on debian unstable to 80.0-1 or later. Fixes are available for 6 affected products.

CVE & CISA-KEV Catalog

CVE-2020-12401

MEDIUM

4.7

CVSS v3

NVD

Description

During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar multiplication was removed, resulting in variable-time execution dependent on secret data. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

CWE-203

How to fix

Remediation Available

firefoxDebian

Fixed in:80.0-1CVE-2020-12401

firefoxUbuntu

Fixed in:80.0+build2-0ubuntu0.16.04.1USN-4474-1

Fixed in:80.0+build2-0ubuntu0.18.04.1USN-4474-1

Fixed in:80.0+build2-0ubuntu0.20.04.1USN-4474-1

libnss3Ubuntu

Fixed in:2:3.28.4-0ubuntu0.14.04.5+esm7USN-4455-1

Fixed in:2:3.28.4-0ubuntu0.16.04.13USN-4455-1

Fixed in:2:3.35-2ubuntu2.11USN-4455-1

Fixed in:2:3.49.1-1ubuntu1.4USN-4455-1

nssUbuntu

Fixed in:2:3.28.4-0ubuntu0.14.04.5+esm7USN-4455-1

Fixed in:2:3.28.4-0ubuntu0.16.04.13USN-4455-1

Fixed in:2:3.35-2ubuntu2.11USN-4455-1

Fixed in:2:3.49.1-1ubuntu1.4USN-4455-1

DeveloperEditionWindows application

Affected:80.0Fixed in:80.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:80.0Fixed in:80.0Mozilla

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 ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.32%probability of exploitation in 30 days

24thpercentile

Low risk: more likely to be exploited than 24% of all known CVEs.

References

Vendor Advisory3

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-203 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2017-5753	Medium	5.6	94%	-	Fix
CVE-2003-0190	Medium	5.0	77%	-	Fix
CVE-2017-5715	Medium	5.6	74%	-	Fix
CVE-2018-3639	Medium	5.5	61%	-	Fix
CVE-2023-28770	High	7.5	58%	-	Fix
CVE-2004-1602	Medium	5.0	31%	-	-

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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.