An incorrect handling of a special element in Busybox's ash applet leads to denial of service when processing a crafted shell command, due to the shell mistaking specific characters for reserved characters. This may be used for DoS under 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: Denial of service

Exploit prediction scoring system (EPSS) score for CVE-2021-42375

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-2021-42375

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-2021-42375

  • The product does not properly filter, remove, quote, or otherwise manage the invalid use of special elements in user-controlled input, which could cause adverse effect on its behavior and integrity.
    Assigned by: reefs@jfrog.com (Secondary)

References for CVE-2021-42375

Products affected by CVE-2021-42375

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