Is CVE-2019-17021 in the CISA KEV catalog?

No. CVE-2019-17021 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-17021?

CVE-2019-17021 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2019-17021?

CVE-2019-17021 has an EPSS score of 1.87% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-17021?

Upgrade DeveloperEdition to 72.0 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2019-17021

MEDIUMEPSS 77th pctl

5.3

CVSS v3

NVD

Description

During the initialization of a new content process, a race condition occurs that can allow a content process to disclose heap addresses from the parent process. *Note: this issue only occurs on Windows. Other operating systems are unaffected.*. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

CWE-362Race Condition

How to fix

Remediation Available

DeveloperEditionWindows application

Affected:72.0Fixed in:72.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:72.0Fixed in:72.0Mozilla

Mozilla Firefox ESR (en-US)Windows application

Affected:68.4Fixed in:68.4Mozilla

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 ComplexityHigh

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.87%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Exploit2

Vendor Advisory2

Third-Party Advisory3

Related Vulnerabilities

Other CWE-362 (Race Condition) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-6387	High	8.1	100%	-	Fix
CVE-2023-36884	High	7.5	99%	KEV + Ransom	Fix
CVE-2018-15473	Medium	5.3	99%	-	Fix
CVE-2024-27983	High	8.2	87%	-	Fix
CVE-2014-0226	Medium	6.8	86%	-	Fix
CVE-2016-5195	High	7.0	84%	KEV	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.