CVE-2020-12417

Q: How do I fix CVE-2020-12417?

Published advisories record a fix for 7 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Q: Is CVE-2020-12417 being actively exploited?

Not that we know of. CVE-2020-12417 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.7% is the estimated probability that it will be exploited in the next 30 days. That is higher than 84% of all scored CVEs.

Q: How severe is CVE-2020-12417?

CVE-2020-12417 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2020-12417 affect?

Published advisories record a fix for firefox (Debian), firefox (Ubuntu), thunderbird (Ubuntu), DeveloperEdition (Windows application), and 3 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGHEPSS 84th pctl

8.8

CVSS v3

NVD

Description

Due to confusion about ValueTags on JavaScript Objects, an object may pass through the type barrier, resulting in memory corruption and a potentially exploitable crash. *Note: this issue only affects Firefox on ARM64 platforms.* This vulnerability affects Firefox ESR < 68.10, Firefox < 78, and Thunderbird < 68.10.0.

CWE-617 CWE-681 CWE-787Out-of-bounds Write

How to fix

Remediation Available

firefoxDebian

Fixed in:78.0-1CVE-2020-12417

firefoxUbuntu

Fixed in:78.0.1+build1-0ubuntu0.16.04.1USN-4408-1

Fixed in:78.0.1+build1-0ubuntu0.18.04.1USN-4408-1

Fixed in:78.0.1+build1-0ubuntu0.20.04.1USN-4408-1

thunderbirdUbuntu

Fixed in:1:68.10.0+build1-0ubuntu0.16.04.1USN-4421-1

Fixed in:1:68.10.0+build1-0ubuntu0.18.04.1USN-4421-1

Fixed in:1:68.10.0+build1-0ubuntu0.20.04.1USN-4421-1

DeveloperEditionWindows application

Affected:78.0Fixed in:78.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:78.0Fixed in:78.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:68.10.0Fixed in:68.10.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:68.10.0Fixed in:68.10.0Mozilla

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

2.69%probability of exploitation in 30 days

84thpercentile

Elevated risk: more likely to be exploited than 84% of all known CVEs.

References

Exploit1

bugzilla.mozilla.org

Vendor Advisory3

Third-Party Advisory7

Related Vulnerabilities

Other CWE-617 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-8617	High	7.5	93%	-	Fix
CVE-2020-36222	High	7.5	78%	-	Fix
CVE-2006-5779	High	7.5	76%	-	Fix
CVE-2021-27212	High	7.5	64%	-	Fix
CVE-2018-5740	High	7.5	60%	-	Fix
CVE-2023-28425	Medium	5.5	55%	-	Fix

Common questions

How do I fix CVE-2020-12417?

Published advisories record a fix for 7 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2020-12417 being actively exploited?

Not that we know of. CVE-2020-12417 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.7% is the estimated probability that it will be exploited in the next 30 days. That is higher than 84% of all scored CVEs.

How severe is CVE-2020-12417?

CVE-2020-12417 has a CVSS v3 base score of 8.8, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2020-12417 affect?

Published advisories record a fix for firefox (Debian), firefox (Ubuntu), thunderbird (Ubuntu), DeveloperEdition (Windows application), and 3 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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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.