Is CVE-2019-9819 in the CISA KEV catalog?

No. CVE-2019-9819 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-9819?

CVE-2019-9819 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2019-9819?

CVE-2019-9819 has an EPSS score of 1.69% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-9819?

Upgrade firefox on debian unstable to 67.0-2 or later. Fixes are available for 7 affected products.

CVE & CISA-KEV Catalog

CVE-2019-9819

CRITICALEPSS 74th pctl

9.8

CVSS v3

NVD

Description

A vulnerability where a JavaScript compartment mismatch can occur while working with the fetch API, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.

CWE-843Type Confusion

How to fix

Remediation Available

firefoxDebian

Fixed in:67.0-2CVE-2019-9819

firefoxUbuntu

Fixed in:67.0+build2-0ubuntu0.16.04.1USN-3991-1

Fixed in:67.0+build2-0ubuntu0.18.04.1USN-3991-1

thunderbirdUbuntu

Fixed in:1:60.7.0+build1-0ubuntu0.16.04.1USN-3997-1

Fixed in:1:60.7.0+build1-0ubuntu0.18.04.1USN-3997-1

DeveloperEditionWindows application

Affected:67.0Fixed in:67.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:67.0Fixed in:67.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:60.7Fixed in:60.7Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:60.7Fixed in:60.7Mozilla

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 InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit Intelligence

1.69%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Vendor Advisory3

Other references1

bugzilla.mozilla.org

Related Vulnerabilities

Other CWE-843 (Type Confusion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2011-0611	High	8.8	99%	KEV	Fix
CVE-2012-0507	Critical	9.8	98%	KEV + Ransom	-
CVE-2017-8291	High	7.8	97%	KEV	Fix
CVE-2019-0752	High	7.5	82%	KEV + Ransom	-
CVE-2017-0037	High	8.1	80%	KEV	-
CVE-2016-7201	High	8.8	80%	KEV	-

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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.