Is CVE-2018-20406 in the CISA KEV catalog?

No. CVE-2018-20406 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-20406?

CVE-2018-20406 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2018-20406?

CVE-2018-20406 has an EPSS score of 5.79% (92th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-20406?

Upgrade python2.7 on ubuntu 14.04 to 2.7.6-8ubuntu0.6+esm2 or later. Fixes are available for 26 affected products.

CVE & CISA-KEV Catalog

CVE-2018-20406

HIGHEPSS 92th pctl

7.5

CVSS v3

NVD

Description

Modules/_pickle.c in Python before 3.7.1 has an integer overflow via a large LONG_BINPUT value that is mishandled during a "resize to twice the size" attempt. This issue might cause memory exhaustion, but is only relevant if the pickle format is used for serializing tens or hundreds of gigabytes of data. This issue is fixed in: v3.4.10, v3.4.10rc1; v3.5.10, v3.5.10rc1, v3.5.7, v3.5.7rc1, v3.5.8, v3.5.8rc1, v3.5.8rc2, v3.5.9; v3.6.10, v3.6.10rc1, v3.6.11, v3.6.11rc1, v3.6.12, v3.6.7, v3.6.7rc1, v3.6.7rc2, v3.6.8, v3.6.8rc1, v3.6.9, v3.6.9rc1; v3.7.1, v3.7.1rc1, v3.7.1rc2, v3.7.2, v3.7.2rc1, v3.7.3, v3.7.3rc1, v3.7.4, v3.7.4rc1, v3.7.4rc2, v3.7.5, v3.7.5rc1, v3.7.6, v3.7.6rc1, v3.7.7, v3.7.7rc1, v3.7.8, v3.7.8rc1, v3.7.9.

CWE-190Integer Overflow

How to fix

Remediation Available

python2.7Ubuntu

Fixed in:2.7.6-8ubuntu0.6+esm2USN-4127-2

Fixed in:2.7.12-1ubuntu0~16.04.8USN-4127-1

Fixed in:2.7.15-4ubuntu4~18.04.1USN-4127-1

python2.7-minimalUbuntu

Fixed in:2.7.6-8ubuntu0.6+esm2USN-4127-2

Fixed in:2.7.12-1ubuntu0~16.04.8USN-4127-1

Fixed in:2.7.15-4ubuntu4~18.04.1USN-4127-1

python3.10Ubuntu

Fixed in:3.10.12-1~22.04.4USN-6891-1

python3.10-minimalUbuntu

Fixed in:3.10.12-1~22.04.4USN-6891-1

python3.11Ubuntu

Fixed in:3.11.0~rc1-1~22.04.1~esm1USN-6891-1

Fixed in:3.11.6-3ubuntu0.1USN-6891-1

python3.11-minimalUbuntu

Fixed in:3.11.0~rc1-1~22.04.1~esm1USN-6891-1

Fixed in:3.11.6-3ubuntu0.1USN-6891-1

python3.12Ubuntu

Fixed in:3.12.0-1ubuntu0.1USN-6891-1

python3.12-minimalUbuntu

Fixed in:3.12.0-1ubuntu0.1USN-6891-1

python3.4Ubuntu

Fixed in:3.4.3-1ubuntu1~14.04.7+esm2USN-4127-2

python3.4-minimalUbuntu

Fixed in:3.4.3-1ubuntu1~14.04.7+esm2USN-4127-2

python3.5Ubuntu

Fixed in:3.5.2-2ubuntu0~16.04.4~14.04.1+esm1USN-6891-1

Fixed in:3.5.2-2ubuntu0~16.04.13+esm13USN-6891-1

Fixed in:3.5.2-2ubuntu0~16.04.8USN-4127-1

python3.5-minimalUbuntu

Fixed in:3.5.2-2ubuntu0~16.04.4~14.04.1+esm1USN-6891-1

Fixed in:3.5.2-2ubuntu0~16.04.8USN-4127-1

Fixed in:3.5.2-2ubuntu0~16.04.13+esm13USN-6891-1

python3.6Ubuntu

Fixed in:3.6.9-1~18.04ubuntu1.13+esm2USN-6891-1

Fixed in:3.6.8-1~18.04.2USN-4127-1

python3.6-minimalUbuntu

Fixed in:3.6.8-1~18.04.2USN-4127-1

Fixed in:3.6.9-1~18.04ubuntu1.13+esm2USN-6891-1

python3.7Ubuntu

Fixed in:3.7.5-2ubuntu1~18.04.2+esm3USN-6891-1

python3.7-minimalUbuntu

Fixed in:3.7.5-2ubuntu1~18.04.2+esm3USN-6891-1

python3.8Ubuntu

Fixed in:3.8.0-3ubuntu1~18.04.2+esm2USN-6891-1

Fixed in:3.8.10-0ubuntu1~20.04.10USN-6891-1

python3.8-minimalUbuntu

Fixed in:3.8.0-3ubuntu1~18.04.2+esm2USN-6891-1

Fixed in:3.8.10-0ubuntu1~20.04.10USN-6891-1

python3.9Ubuntu

Fixed in:3.9.5-3ubuntu0~20.04.1+esm2USN-6891-1

python3.9-minimalUbuntu

Fixed in:3.9.5-3ubuntu0~20.04.1+esm2USN-6891-1

Python 2Windows application

Affected:3.4.0 3.7.1Fixed in:3.7.1Python Software Foundation

Python 3.10Windows application

Affected:3.4.0 3.7.1Fixed in:3.7.1Python Software Foundation

Python 3.11Windows application

Affected:3.4.0 3.7.1Fixed in:3.7.1Python Software Foundation

Python 3.12Windows application

Affected:3.4.0 3.7.1Fixed in:3.7.1Python Software Foundation

Python 3.8Windows application

Affected:3.4.0 3.7.1Fixed in:3.7.1Python Software Foundation

Python 3.9Windows application

Affected:3.4.0 3.7.1Fixed in:3.7.1Python Software Foundation

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

5.79%probability of exploitation in 30 days

92ndpercentile

High risk: more likely to be exploited than 92% of all known CVEs.

References

Patch2

Third-Party Advisory1

lists.debian.org

Other references12

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.