PT-2021-14318 · Fibaro · Fibaro Home Center 2+1

Marton Illes · Published 2021-04-19 · Updated 2022-10-29 · CVE-2021-20989

Positive Technologies (AI Summary)

CVSS v3.1

5.9

Medium

Base vector

AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions: Fibaro Home Center 2 and Lite devices with firmware version 4.600 and older

Description: The issue concerns Fibaro Home Center 2 and Lite devices that initiate SSH connections to the Fibaro cloud for remote access and support. This connection is vulnerable to interception via a DNS spoofing attack, allowing an attacker to use a device-initiated remote port-forward channel to connect to the web management interface. To perform further actions, knowledge of authorization credentials to the management interface is required.

Recommendations: For firmware version 4.600 and older, update to a version newer than 4.600 to resolve the issue. As a temporary workaround, consider restricting access to the web management interface until a patch is available. Avoid using the device-initiated remote port-forward channel for remote access and support until the issue is resolved.

Exploit

Fix

Improper Certificate Validation

Weakness Enumeration

CWE-295

Related Identifiers

CVE-2021-20989

Affected Products

Fibaro Home Center 2

Fibaro Home Center Lite

References · 8

• 🔥 https://iot-inspector.com/blog/advisory-fibaro-home-center · Exploit
• 🔥 http://packetstormsecurity.com/files/162243/Fibaro-Home-Center-MITM-Missing-Authentication-Code-Execution.html · Exploit
• https://osv.dev/vulnerability/CVE-2021-20989 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-20989 · Security Note
• http://seclists.org/fulldisclosure/2021/Apr/27 · Note
• https://t.me/cybersecuritytechnologies/3192 · Telegram Post
• https://t.me/cvenotify/13449 · Telegram Post
• https://t.me/defcon_news/74074 · Telegram Post