NULL pointer dereference in Busybox
CVE-2021-42376
A NULL pointer dereference in Busybox's hush applet leads to denial of service when processing a crafted shell command, due to missing validation after a \x03 delimiter character. This may be used for DoS under very rare conditions of filtered command input.
EPSS: 0.004 (32.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- reefs@jfrog.com (Third Party Advisory)
- reefs@jfrog.com (vendor-advisory)
- reefs@jfrog.com (vendor-advisory)
- reefs@jfrog.com (Third Party Advisory)
- reefs@jfrog.com
Frequently asked questions
- What is CVE-2021-42376?
- CVE-2021-42376 is a medium-severity vulnerability in Busybox, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2021-11-15.
- How severe is CVE-2021-42376?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-42376 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.