CVE-2021-42377

NameCVE-2021-42377
DescriptionAn 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs999567

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
busybox (PTS)buster1:1.30.1-4vulnerable (unimportant)
bullseye1:1.30.1-6vulnerable (unimportant)
bookworm1:1.35.0-4fixed
sid, trixie1:1.36.1-6fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
busyboxsourcestretch(not affected)
busyboxsource(unstable)1:1.35.0-1999567

Notes

[bullseye] - busybox <no-dsa> (Minor issue)
[buster] - busybox <no-dsa> (Minor issue)
[stretch] - busybox <not-affected> (CONFIG_HUSH is not set)
https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/

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