CVE-2021-42377

CVSS V2 Medium 6.8 CVSS V3 Critical 9.8

Description

An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution when processing a crafted shell command, due to the shell mishandling the &&& string. This may be used for remote code execution under rare conditions of filtered command input.

Overview

CVE ID
CVE-2021-42377

Assigner
reefs@jfrog.com

Vulnerability Status
Modified

Published Version
2021-11-15T21:15:07

Last Modified Date
2023-04-25T21:15:09

Weakness Enumerations

CWE	URL
CWE-763	http://cwe.mitre.org/data/definitions/763.html
CWE-590	http://cwe.mitre.org/data/definitions/590.html

CPE Configuration (Product)

CPE	Vulnerable	Operator
		AND
cpe:2.3:a:busybox:busybox:1.33.0:::::::*	1	OR
cpe:2.3:a:busybox:busybox:1.33.1:::::::*	1	OR
		AND
cpe:2.3:o:fedoraproject:fedora:33:::::::*	1	OR
cpe:2.3:o:fedoraproject:fedora:34:::::::*	1	OR
		AND
cpe:2.3:a:netapp:cloud_backup:-:::::::*	1	OR
cpe:2.3:a:netapp:hci_management_node:-:::::::*	1	OR
cpe:2.3:a:netapp:solidfire:-:::::::*	1	OR
		AND
cpe:2.3:o:netapp:h300s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h300s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h500s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h500s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h700s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h700s:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h300e_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h300e:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h500e_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h500e:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h700e_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h700e:-:::::::*	0	OR
		AND
cpe:2.3:o:netapp:h410s_firmware:-:::::::*	1	OR
cpe:2.3:h:netapp:h410s:-:::::::*	0	OR

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:M/Au:N/C:P/I:P/A:P

Access Vector
NETWORK

Access Compatibility
MEDIUM

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
PARTIAL

Base Score
6.8

Severity
MEDIUM

Exploitability Score
8.6

Impact Score
6.4

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
NONE

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
HIGH

Base Score
9.8

Base Severity
CRITICAL

Exploitability Score
3.9

Impact Score
5.9

References

Reference URL	Reference Tags
https://claroty.com/team82/research/unboxing-busybox-14-vulnerabilities-uncovered-by-claroty-jfrog
https://jfrog.com/blog/unboxing-busybox-14-new-vulnerabilities-uncovered-by-claroty-and-jfrog/	Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/6T2TURBYYJGBMQTTN2DSOAIQGP7WCPGV/	Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UQXGOGWBIYWOIVXJVRKHZR34UMEHQBXS/	Mailing List Third Party Advisory
https://security.netapp.com/advisory/ntap-20211223-0002/	Third Party Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-42377
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-42377

History

Created	Old Value	New Value	Data Type	Notes
2022-04-04 00:39:47				Added to TrackCVE
2022-12-05 14:34:44	security@jfrog.com	reefs@jfrog.com	CVE Assigner	updated
2022-12-05 14:34:44	2021-11-15T21:15Z	2021-11-15T21:15:07	CVE Published Date	updated
2022-12-05 14:34:44		2022-03-31T16:29:33	CVE Modified Date	updated
2022-12-05 14:34:44		Analyzed	Vulnerability Status	updated
2023-04-25 22:12:24		2023-04-25T21:15:09	CVE Modified Date	updated
2023-04-25 22:12:24	Analyzed	Modified	Vulnerability Status	updated
2023-04-25 22:12:29			Weakness Enumeration	update
2023-04-25 22:12:29			References	updated