Is CVE-2019-9809 in the CISA KEV catalog?

No. CVE-2019-9809 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-9809?

CVE-2019-9809 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2019-9809?

CVE-2019-9809 has an EPSS score of 1.64% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-9809?

Upgrade firefox on debian unstable to 66.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2019-9809

HIGHEPSS 74th pctl

7.5

CVSS v3

NVD

Description

If the source for resources on a page is through an FTP connection, it is possible to trigger a series of modal alert messages for these resources through invalid credentials or locations. These messages cannot be immediately dismissed, allowing for a denial of service (DOS) attack. This vulnerability affects Firefox < 66.

CWE-399Resource Management Errors

How to fix

Remediation Available

firefoxDebian

Fixed in:66.0-1CVE-2019-9809

firefoxUbuntu

Fixed in:66.0.1+build1-0ubuntu0.14.04.1USN-3918-2

Fixed in:66.0+build3-0ubuntu0.16.04.2USN-3918-1

Fixed in:66.0+build3-0ubuntu0.18.04.1USN-3918-1

DeveloperEditionWindows application

Affected:66.0Fixed in:66.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:66.0Fixed in:66.0Mozilla

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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.64%probability of exploitation in 30 days

74thpercentile

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

References

Patch1

bugzilla.mozilla.org

Vendor Advisory2

Related Vulnerabilities

Other CWE-399 (Resource Management Errors) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2009-3103	High	10.0	90%	-	-
CVE-2009-0075	High	9.3	85%	-	-
CVE-2005-1790	Low	2.6	83%	-	-
CVE-2010-0806	High	8.8	82%	KEV	-
CVE-2009-2526	High	7.8	82%	-	-
CVE-2015-1868	High	7.8	82%	-	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.