Vulnerability · Published Nov 15, 2021 · Assigned by JFROG
CVE-2021-42373
Medium 5.5
In plain English
A medium-severity null pointer dereference in busybox from busybox. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.4%top 64.7% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
A NULL pointer dereference in Busybox's man applet leads to denial of service when a section name is supplied but no page argument is given
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.20 | busybox | 0 | ALPINE-CVE-2021-42373 |
| Alpine:v3.21 | busybox | 0 | ALPINE-CVE-2021-42373 |
| Alpine:v3.22 | busybox | 0 | ALPINE-CVE-2021-42373 |
| Alpine:v3.23 | busybox | 0 | ALPINE-CVE-2021-42373 |
| Alpine:v3.24 | busybox | 0 | ALPINE-CVE-2021-42373 |
| Debian:12 | busybox | 1:1.35.0-1 | DEBIAN-CVE-2021-42373 |
| Debian:13 | busybox | 1:1.35.0-1 | DEBIAN-CVE-2021-42373 |
| Debian:14 | busybox | 1:1.35.0-1 | DEBIAN-CVE-2021-42373 |
| Ubuntu:22.04:LTS | busybox | 1:1.30.1-6ubuntu3 | UBUNTU-CVE-2021-42373 |
Affected products (as reported)
Weakness: CWE-476
References
- https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/
- FEDORA-2021-5a95823596 vendor-advisory
- FEDORA-2021-c52c0fe490 vendor-advisory
- https://security.netapp.com/advisory/ntap-20211223-0002/
- https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog