A busybox security update has been released for Arch Linux.

ASA-202103-12: busybox: denial of service

Arch Linux Security Advisory ASA-202103-12
=========================================
Severity: Low
Date : 2021-03-25
CVE-ID : CVE-2021-28831
Package : busybox
Type : denial of service
Remote : No
Link :   https://security.archlinux.org/AVG-1707

Summary
======
The package busybox before version 1.32.1-4 is vulnerable to denial of
service.

Resolution
=========
Upgrade to 1.32.1-4.

# pacman -Syu "busybox>=1.32.1-4"

The problem has been fixed upstream but no release is available yet.

Workaround
=========
None.

Description
==========
decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit
on the huft_build result pointer, with a resultant invalid free or
segmentation fault, via malformed gzip data.

Impact
=====
A local attacker is able to provide a crafted zip file to crash the
application.

References
=========
  https://bugs.archlinux.org/task/70075
  https://git.busybox.net/busybox/commit/?id?5d254dfd4243698c31a4f3153d4ac72aa9e9bd
  https://security.archlinux.org/CVE-2021-28831