CVE-2021-42377
9.8
CRITICAL
CVSS 3.1
EPSS 2.9%
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.
How to fix CVE-2021-42377
To remediate CVE-2021-42377, upgrade the affected package to a fixed version below.
- Alpine/busybox—upgrade to 0 or later
- —no fix listed
Is CVE-2021-42377 being exploited?
Low — EPSS is 2.9%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 0
- from 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 |