Vulnerability in Busybox
CVE-2021-42377
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.036 (89.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: -0.000
Affected products
Weakness classification (CWE)
References
- jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and… (Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.netapp.com/advisory/ntap-20211223-0002/ (Third Party Advisory)
- claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-cl…
Frequently asked questions
- What is CVE-2021-42377?
- CVE-2021-42377 is a critical-severity vulnerability in Busybox, classified under CWE-590. CVSS score: 9.8/10. Published 2021-11-15.
- How severe is CVE-2021-42377?
- Critical severity. CVSS v3 base score is 9.8 out of 10.