#VU62377 Integer overflow in klibc - CVE-2021-31872
Published: April 19, 2022
Vulnerability identifier: #VU62377
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2021-31872
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
klibc
klibc
Software vendor:
git.kernel.org
git.kernel.org
Description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to integer overflow in the cpio command. A remote attacker can pass specially crafted data to the application, trigger integer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Remediation
Install updates from vendor's website.
External links
- https://kernel.org/pub/linux/libs/klibc/2.0/
- https://lists.zytor.com/archives/klibc/2021-April/004593.html
- https://git.kernel.org/pub/scm/libs/klibc/klibc.git/commit/?id=9b1c91577aef7f2e72c3aa11a27749160bd278ff
- http://www.openwall.com/lists/oss-security/2021/04/30/1
- https://lists.debian.org/debian-lts-announce/2021/06/msg00025.html