Is CVE-2020-36242 in the CISA KEV catalog?

No. CVE-2020-36242 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-36242?

CVE-2020-36242 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2020-36242?

CVE-2020-36242 has an EPSS score of 6.72% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-36242?

Upgrade python-cryptography on debian 11 to 3.3.2-1 or later.

CVE & CISA-KEV Catalog

CVE-2020-36242

CRITICALEPSS 93th pctl

9.1

CVSS v3

NVD

Description

In the cryptography package before 3.3.2 for Python, certain sequences of update calls to symmetrically encrypt multi-GB values could result in an integer overflow and buffer overflow, as demonstrated by the Fernet class.

CWE-190Integer Overflow CWE-787Out-of-bounds Write

How to fix

Remediation Available

python-cryptographyDebian

Fixed in:3.3.2-1CVE-2020-36242

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

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

6.72%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Patch4

Third-Party Advisory1

github.com

Other references1

lists.fedoraproject.org

Related Vulnerabilities

Other CWE-190 (Integer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix
CVE-2019-11477	High	7.5	99%	-	Fix
CVE-2023-44443	High	7.8	94%	-	Fix
CVE-2014-0569	High	9.3	90%	-	-
CVE-2017-3599	High	7.5	90%	-	Fix
CVE-2023-21716	Critical	9.8	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.