CVE-2021-31871: An issue was discovered in klibc before 2.0.9

High severity · published Apr 30, 2021

CVE-2021-31871

An issue was discovered in klibc before 2.0.9

7.5

CVSS

1.9%

EPSS

On KEV

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.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

None

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)1.9% · higher than 79% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Debian Linux · Debian

9.0 · source: NVD

Klibc · Klibc Project

before 2.0.9 · source: NVD

Affected product

Debian Linux

Debian

All Debian Linux CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-31871

CVE.org

https://www.cve.org/CVERecord?id=CVE-2021-31871

Mailing List

http://www.openwall.com/lists/oss-security/2021/04/30/1

Patch

https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5

Release Notes

https://kernel.org/pub/linux/libs/klibc/2.0/

Mailing List

https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html

Mailing List

https://lists.zytor.com/archives/klibc/2021-April/004593.html