Is CVE-2018-19839 in the CISA KEV catalog?

No. CVE-2018-19839 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-19839?

CVE-2018-19839 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2018-19839?

CVE-2018-19839 has an EPSS score of 2.16% (80th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-19839?

Upgrade libsass on debian 11 to 3.5.5-4 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2018-19839

MEDIUMEPSS 80th pctl

6.5

CVSS v3

NVD

Description

In LibSass prior to 3.5.5, the function handle_error in sass_context.cpp allows attackers to cause a denial-of-service resulting from a heap-based buffer over-read via a crafted sass file.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

libsassDebian

Fixed in:3.5.5-4CVE-2018-19839

libsassUbuntu

Fixed in:3.4.8-1ubuntu0.1~esm1USN-4837-1

libsass0Ubuntu

Fixed in:3.4.8-1ubuntu0.1~esm1USN-4837-1

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

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

2.16%probability of exploitation in 30 days

80thpercentile

Elevated risk: more likely to be exploited than 80% of all known CVEs.

References

Patch1

github.com

Exploit1

github.com

Other references3

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2023-49285	High	8.6	89%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	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.