PT-2021-4568 · Klibc+4 · Klibc+4

Ben Hutchings · Published 2021-04-28 · Updated 2022-04-26 · CVE-2021-31871

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions klibc versions prior to 2.0.9

Description An issue in the cpio command of the klibc library on 64-bit systems is related to an integer overflow, which may result in a NULL pointer dereference. This issue can be exploited by a remote attacker to cause a denial of service.

Recommendations For versions prior to 2.0.9, update to version 2.0.9 or later to resolve the issue. As a temporary workaround, consider restricting the use of the cpio command until a patch is available.

Fix

Integer Overflow

Weakness Enumeration

CWE-190

Related Identifiers

ALT-PU-2021-1803

ALT-PU-2022-1761

BDU:2021-05239

CVE-2021-31871

DLA-2695-1

USN-5379-1

Affected Products

Alt Linux

Astra Linux

Linuxmint

Ubuntu

Klibc

References · 24

• https://osv.dev/vulnerability/DEBIAN-CVE-2021-31871 · Vendor Advisory
• https://ubuntu.com/security/CVE-2021-31872 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-31871 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/678242 · Security Note
• https://wiki.astralinux.ru/astra-linux-se17-bulletin-2021-1126SE17 · Vendor Advisory
• https://safe-surf.ru/specialists/bulletins-nkcki/682249 · Security Note
• https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=2e48a12ab1e30d43498c2d53e878a11a1b5102d5 · Patch
• https://osv.dev/vulnerability/DLA-2695-1 · Vendor Advisory
• https://bdu.fstec.ru/vul/2021-05239 · Security Note
• https://ubuntu.com/security/CVE-2021-31873 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2021-31871 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2021-31871 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se16-bulletin-20211008SE16 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-5379-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-31871 · Security Note