Is CVE-2021-31871 in the CISA KEV catalog?

No. CVE-2021-31871 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-31871?

CVE-2021-31871 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-31871?

CVE-2021-31871 has an EPSS score of 1.86% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-31871?

Upgrade klibc on debian 11 to 2.0.8-6 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-31871

HIGHEPSS 77th pctl

7.5

CVSS v3

NVD

Description

An issue was discovered in klibc before 2.0.9. An integer overflow in the cpio command may result in a NULL pointer dereference on 64-bit systems.

CWE-190Integer Overflow

How to fix

Remediation Available

klibcDebian

Fixed in:2.0.8-6CVE-2021-31871

klibcUbuntu

Fixed in:2.0.3-0ubuntu1.14.04.3+esm2USN-5379-1

Fixed in:2.0.4-8ubuntu1.16.04.4+esm1USN-5379-1

Fixed in:2.0.4-9ubuntu2.1USN-5379-1

Fixed in:2.0.7-1ubuntu5.1USN-5379-1

klibc-utilsUbuntu

Fixed in:2.0.3-0ubuntu1.14.04.3+esm2USN-5379-1

Fixed in:2.0.4-8ubuntu1.16.04.4+esm1USN-5379-1

Fixed in:2.0.4-9ubuntu2.1USN-5379-1

Fixed in:2.0.7-1ubuntu5.1USN-5379-1

libklibcUbuntu

Fixed in:2.0.3-0ubuntu1.14.04.3+esm2USN-5379-1

Fixed in:2.0.4-8ubuntu1.16.04.4+esm1USN-5379-1

Fixed in:2.0.4-9ubuntu2.1USN-5379-1

Fixed in:2.0.7-1ubuntu5.1USN-5379-1

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 InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.86%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Patch1

git.kernel.org

Third-Party Advisory4

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

Embed a live status badge for CVE-2021-31871

Markdown

[![CVE-2021-31871](https://tridentstack.com/cve/badge/CVE-2021-31871.svg)](https://tridentstack.com/cve/CVE-2021-31871)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-31871"><img src="https://tridentstack.com/cve/badge/CVE-2021-31871.svg" alt="CVE-2021-31871"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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.