CVE-2021-42376

Name	CVE-2021-42376
Description	A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character. This may be used for DoS under very rare conditions of filtered command input.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs	999567

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
busybox (PTS)	buster	1:1.30.1-4	vulnerable
	bullseye	1:1.30.1-6	vulnerable
	bookworm, sid	1:1.35.0-4	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
busybox	source	stretch	(not affected)
busybox	source	(unstable)	1:1.35.0-1	unimportant		999567

Notes

[stretch] - busybox <not-affected> (CONFIG_HUSH is not set)
https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
Crash in CLI tool, no security impact