CVE-2021-42377

Name	CVE-2021-42377
Description	An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, 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)	bullseye	1:1.30.1-6	vulnerable
	bullseye (security)	1:1.30.1-6+deb11u1	vulnerable
	bookworm	1:1.35.0-4	fixed
	sid, trixie	1:1.37.0-4	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
busybox	source	(unstable)	1:1.35.0-1	unimportant		999567

https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
CONFIG_HUSH is not set to build hush