1. EXECUTIVE SUMMARY
- CVSS v3 8.8
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Korenix
- Equipment: Jetwave
- Vulnerabilities: Command Injection, Uncontrolled Resource Consumption
2. RISK EVALUATION
Successful exploitation of these vulnerabilities could allow an attacker to gain full access to the underlying operating system of the device or cause a denial-of-service condition.
3. TECHNICAL DETAILS
3.1 AFFECTED PRODUCTS
The following versions of Korenix Jetwave, are affected:
- Korenix JetWave4221 HP-E versions V1.3.0 and prior
- Korenix JetWave 3220/3420 V3 versions prior to V1.7
- Korenix JetWave 2212G version V1.3.T
- Korenix JetWave 2212X/2112S version V1.3.0
- Korenix JetWave 2211C versions prior to V1.6
- Korenix JetWave 2411/2111 versions prior to V1.5
- Korenix JetWave 2411L/2111L versions prior to V1.6
- Korenix JetWave 2414/2114 versions prior to V1.4
- Korenix JetWave 2424 versions prior to V1.3
- Korenix JetWave 2460 versions prior to V1.6
3.2 VULNERABILITY OVERVIEW
3.2.1 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77
Korenix JetWave 4200 Series 1.3.0 and JetWave 3000 Series 1.6.0 are vulnerable to command injection. An attacker could modify the file_name parameter to execute commands as root.
CVE-2023-23294 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
3.2.2 IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN A COMMAND (‘COMMAND INJECTION’) CWE-77
Korenix Jetwave 4200 Series 1.3.0 and JetWave 3000 Series 1.6.0 are vulnerable to command injection via /goform/formSysCmd. An attacker could modify the sysCmd parameter to execute commands as root.
CVE-2023-23295 has been assigned to this vulnerability. A CVSS v3 base score of 8.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
3.2.3 UNCONTROLLED RESOURCE CONSUMPTION CWE-400
Korenix JetWave 4200 Series 1.3.0 and JetWave 3200 Series 1.6.0 are vulnerable to a possible denial-of-service condition via /goform/formDefault. When logged in, a user could issue a POST request so that the underlying binary exits. The web-service then becomes unavailable and cannot be accessed until a user reboots the device.
CVE-2023-23296 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:N/A:H).
3.3 BACKGROUND
- CRITICAL INFRASTRUCTURE SECTORS: Communications
- COUNTRIES/AREAS DEPLOYED: Worldwide
- COMPANY HEADQUARTERS LOCATION: Taiwan
3.4 RESEARCHER
Thomas Weber of CyberDanube reported these vulnerabilities to Korenix.
4. MITIGATIONS
Korenix recommends all users update their JetWave products to the latest firmware:
According to Korenix, users should visit Korenix and navigate to the appropriate Korenix JetWave product page, found in the “Wireless” section on the site, and download the latest firmware.
For more information, see Korenix’s Security Advisory.
CISA recommends users take defensive measures to minimize the risk of exploitation of 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.