CVE-2021-42377
CRITICAL9.8EPSS 2.9%Published: 11/15/2021Modified: 4/28/2026
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.
Affected packages (2)
- Alpine/busyboxfrom 0, < 0
- Debian/busyboxfrom 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |