CVE-2021-42380
HIGHCVSS 7.2/10EPSS 2.87%
Last modified
CVE-2021-42380 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the clrvar function. EPSS estimates a 2.87% chance of exploitation in the next 30 days.
Description
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the clrvar function
Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Busybox | Busybox | >= 1.28.0, <= 1.33.1 |
| Fedoraproject | Fedora | 33 |
| Fedoraproject | Fedora | 34 |
References
- https://security.netapp.com/advisory/ntap-20211223-0002/Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211223-0002/Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-42380?
A use-after-free in Busybox's awk applet leads to denial of service and possibly code execution when processing a crafted awk pattern in the clrvar function
How severe is CVE-2021-42380?
CVE-2021-42380 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 2.87% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42380?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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Related CVEs from 2021
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- CVE-2021-42378A use-after-free in Busybox's awk applet leads to denial of …7.2
- CVE-2021-42379A use-after-free in Busybox's awk applet leads to denial of …7.2
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- CVE-2021-42381A use-after-free in Busybox's awk applet leads to denial of …7.2
- CVE-2021-42382A use-after-free in Busybox's awk applet leads to denial of …7.2
- CVE-2021-42383A use-after-free in Busybox's awk applet leads to denial of …7.2
- CVE-2021-42384A use-after-free in Busybox's awk applet leads to denial of …7.2
- CVE-2021-42385A use-after-free in Busybox's awk applet leads to denial of …7.2
- CVE-2021-42386A use-after-free in Busybox's awk applet leads to denial of …7.2
Are you affected by CVE-2021-42380?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST