VULNERABILITY INTELLIGENCE

CVE-2021-42377

CVSS score9.8 CRITICAL
EPSS probability3.62%
CISA KEVNot currently listed
Published2021-11-15
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Weakness classification

  • reefs@jfrog.com: CWE-590
  • nvd@nist.gov: CWE-763

Primary references