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.
Published 2021-11-15 21:15:08
Updated 2023-04-25 21:15:10
Source JFrog
View at NVD,   CVE.org
Vulnerability category: Memory CorruptionDenial of service

Threat overview for CVE-2021-42376

Top countries where our scanners detected CVE-2021-42376
Top open port discovered on systems with this issue 443
IPs affected by CVE-2021-42376 375,856
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2021-42376!
*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-2021-42376

Probability of exploitation activity in the next 30 days: 0.05%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 12 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2021-42376

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
1.9
LOW AV:L/AC:M/Au:N/C:N/I:N/A:P
3.4
2.9
NIST
5.5
MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
1.8
3.6
NIST

CWE ids for CVE-2021-42376

  • A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.
    Assigned by:
    • nvd@nist.gov (Primary)
    • reefs@jfrog.com (Secondary)

References for CVE-2021-42376

Products affected by CVE-2021-42376

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