Vulnerability Details : 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
Published 2021-11-15 21:15:08
Updated 2023-04-25 22:15:09
Source JFrog
View at NVD,   CVE.org
Vulnerability category: Memory CorruptionDenial of service

Threat overview for CVE-2021-42386

Top countries where our scanners detected CVE-2021-42386
Top open port discovered on systems with this issue 443
IPs affected by CVE-2021-42386 451,965
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-42386!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2021-42386

EPSS FAQ
0.24%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 61 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-42386

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
6.5
 MEDIUM AV:N/AC:L/Au:S/C:P/I:P/A:P
8.0
6.4
 NIST
7.2
 HIGH CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
1.2
5.9
 NIST

CWE ids for CVE-2021-42386

  • The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
    Assigned by:
    • nvd@nist.gov (Primary)
    • reefs@jfrog.com (Secondary)

References for CVE-2021-42386

Products affected by CVE-2021-42386

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