| 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) | jessie, jessie (lts) | 1:1.22.0-9+deb8u5 | fixed |
| stretch (security), stretch (lts), stretch | 1:1.22.0-19+deb9u2 | fixed |
| buster | 1:1.30.1-4 | vulnerable |
| bullseye | 1:1.30.1-6 | 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 | jessie | (not affected) | | | |
| busybox | source | stretch | (not affected) | | | |
| busybox | source | (unstable) | 1:1.35.0-1 | | | 999567 |
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/
[jessie] - busybox <not-affected> (CONFIG_HUSH is not set)