Headline
Nexx Smart Home Device
- EXECUTIVE SUMMARY CVSS v3 8.6 ATTENTION: Exploitable remotely/low attack complexity Vendor: Nexx Equipment: Garage Door Controller, Smart Plug, Smart Alarm Vulnerabilities: Use of Hard-coded Credentials, Authorization Bypass through User-controlled Key, Improper Input Validation, Improper Authentication
- RISK EVALUATION Successful exploitation of these vulnerabilities could allow an attacker to receive sensitive information, execute application programmable interface (API) requests, or hijack devices.
- TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of Nexx Smart Home devices are affected: Nexx Garage Door Controller (NXG-100B, NXG-200): Version nxg200v-p3-4-1 and prior Nexx Smart Plug (NXPG-100W): Version nxpg100cv4-0-0 and prior Nexx Smart Alarm (NXAL-100): Version nxal100v-p1-9-1and prior 3.2 VULNERABILITY OVERVIEW 3.2.1 USE OF HARD-CODED CREDENTIALS CWE-798 CVE-2023-1748 has been assigned to this vulnerability. A CVSS v3 base score of 8.6 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:L). 3.2.2 AUTHORIZATION BYPASS THROUGH USER-CONTROLLED KEY CWE-639 CVE-2023-1749 has been assigned to this vulnerability. A CVSS v3 base score of 6.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N). 3.2.3 AUTHORIZATION BYPASS THROUGH USER-CONTROLLED KEY CWE-639 CVE-2023-1750 has been assigned to this vulnerability. A CVSS v3 base score of 7.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N). 3.2.4 IMPROPER INPUT VALIDATION CWE-20 CVE-2023-1751 has been assigned to this vulnerability. A CVSS v3 base score of 7.5 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N). 3.2.5 IMPROPER AUTHENTICATION CWE-287 CVE-2023-1752 has been assigned to this vulnerability. A CVSS v3 base score of 8.1 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Commercial Facilities COUNTRIES/AREAS DEPLOYED: Worldwide COMPANY HEADQUARTERS LOCATION: United States 3.4 RESEARCHER Sam Sabetan reported these vulnerabilities to CISA.
- MITIGATIONS Nexx has not responded to requests to work with CISA to mitigate these vulnerabilities. Users of the affected product are encouraged to contact Nexx support for additional information. CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability these vulnerabilities. Specifically, users should: Minimize network exposure for all control system devices and/or systems, and ensure they are not accessible from the Internet. Locate control system networks and remote devices behind firewalls and isolate them from business networks. When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize VPN is only as secure as its connected devices. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures. CISA also provides a section for control systems security recommended practices on the ICS webpage at cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. No known public exploits specifically target these vulnerabilities.