CVE-2021-42386
HIGHCVSS 7.2/10EPSS 2.61%
Last modified
CVE-2021-42386 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 nvalloc function. EPSS estimates a 2.61% 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 nvalloc 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 | >= 1.16.0, <= 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-2021-42386?
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 nvalloc function
How severe is CVE-2021-42386?
CVE-2021-42386 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 2.61% probability of exploitation in the next 30 days.
How do I fix CVE-2021-42386?
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.
Are you affected by CVE-2021-42386?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST