Is CVE-2020-18442 in the CISA KEV catalog?

No. CVE-2020-18442 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-18442?

CVE-2020-18442 has a CVSS v3 base score of 3.3 (LOW).

What is the EPSS score for CVE-2020-18442?

CVE-2020-18442 has an EPSS score of 0.74% (50th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-18442?

Upgrade zziplib on debian 11 to 0.13.62-3.3+deb11u1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2020-18442

LOW

3.3

CVSS v3

NVD

Description

Infinite Loop in zziplib v0.13.69 allows remote attackers to cause a denial of service via the return value "zzip_file_read" in the function "unzzip_cat_file".

CWE-835

How to fix

Remediation Available

zziplibDebian

Fixed in:0.13.62-3.3+deb11u1CVE-2020-18442

Fixed in:0.13.72+dfsg.1-1CVE-2020-18442

libzzip-0-13Ubuntu

Fixed in:0.13.62-3ubuntu0.16.04.2+esm1USN-6298-1

Fixed in:0.13.62-3.1ubuntu0.18.04.1+esm1USN-6298-1

Fixed in:0.13.62-3.2ubuntu1.1USN-6298-1

libzzip-devUbuntu

Fixed in:0.13.62-3ubuntu0.16.04.2+esm1USN-6298-1

Fixed in:0.13.62-3.1ubuntu0.18.04.1+esm1USN-6298-1

Fixed in:0.13.62-3.2ubuntu1.1USN-6298-1

zziplibUbuntu

Fixed in:0.13.62-3ubuntu0.16.04.2+esm1USN-6298-1

Fixed in:0.13.62-3.1ubuntu0.18.04.1+esm1USN-6298-1

Fixed in:0.13.62-3.2ubuntu1.1USN-6298-1

zziplib-binUbuntu

Fixed in:0.13.62-3ubuntu0.16.04.2+esm1USN-6298-1

Fixed in:0.13.62-3.1ubuntu0.18.04.1+esm1USN-6298-1

Fixed in:0.13.62-3.2ubuntu1.1USN-6298-1

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 VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

0.74%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory1

lists.debian.org

Other references2

Related Vulnerabilities

Other CWE-835 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13935	High	7.5	88%	-	Fix
CVE-2020-36227	High	7.5	78%	-	Fix
CVE-2022-0778	High	7.5	71%	-	Fix
CVE-2019-14241	High	7.5	70%	-	-
CVE-2017-16944	High	7.5	63%	-	Fix
CVE-2024-20353	High	8.6	63%	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 2025-07-10.