CVE-2021-20991 : In Fibaro Home Center 2 and Lite devices with firmware version 4.540 and older a

In Fibaro Home Center 2 and Lite devices with firmware version 4.540 and older an authenticated user can run commands as root user using a command injection vulnerability.

Published 2021-04-19 14:15:12

Updated 2022-04-26 16:03:39

Source CERT VDE

View at NVD, CVE.org

Products affected by CVE-2021-20991

Fibaro » Home Center 2 Firmware
Versions up to, including, (<=) 4.540
cpe:2.3:o:fibaro:home_center_2_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Fibaro » Home Center 2 » Version: N/A
Fibaro » Home Center Lite Firmware
Versions up to, including, (<=) 4.540
cpe:2.3:o:fibaro:home_center_lite_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Fibaro » Home Center Lite » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-20991

EPSS FAQ

3.89%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 92 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20991

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
9.0	HIGH	AV:N/AC:L/Au:S/C:C/I:C/A:C	8.0	10.0	NIST
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: Complete Integrity Impact: Complete Availability Impact: Complete
9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9	CERT VDE
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
8.8	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	2.8	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2021-20991

CWE-77 Improper Neutralization of Special Elements used in a Command ('Command Injection')

The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

Assigned by: nvd@nist.gov (Primary)
CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.

Assigned by: info@cert.vde.com (Secondary)

References for CVE-2021-20991

http://packetstormsecurity.com/files/162243/Fibaro-Home-Center-MITM-Missing-Authentication-Code-Execution.html

Fibaro Home Center MITM / Missing Authentication / Code Execution ≈ Packet Storm
Exploit;Third Party Advisory;VDB Entry

CVEs referencing this url
https://www.iot-inspector.com/blog/advisory-fibaro-home-center/

Advisory: Multiple Vulnerabilities in Fibaro Home Center - IoT Inspector
Exploit;Third Party Advisory

CVEs referencing this url
http://seclists.org/fulldisclosure/2021/Apr/27

Full Disclosure: [CVE-2021-20989, CVE-2021-20990, CVE-2021-20991, CVE-2021-20992] Multiple vulnerabilities in Fibaro Home Center
Mailing List;Third Party Advisory

CVEs referencing this url

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Vulnerability Details : CVE-2021-20991

Products affected by CVE-2021-20991

Exploit prediction scoring system (EPSS) score for CVE-2021-20991

CVSS scores for CVE-2021-20991

CWE ids for CVE-2021-20991

References for CVE-2021-20991