Description Preview
The Realtek Jungle SDK versions v2.x up to v3.4.14B includes a diagnostic tool called 'MP Daemon' (typically compiled as 'UDPServer' binary) that contains critical security vulnerabilities. These include multiple memory corruption issues and an arbitrary command injection vulnerability that can be exploited by remote unauthenticated attackers, potentially leading to complete system compromise.
Overview
The 'MP Daemon' diagnostic tool in Realtek Jungle SDK is designed for diagnostic purposes but contains severe security flaws. The vulnerabilities affect the UDPServer binary and can be exploited remotely without authentication. The impact is particularly concerning because Realtek SDKs are widely used in various IoT devices, including routers, access points, and other network-connected devices. Successful exploitation could allow attackers to execute arbitrary code with the privileges of the running service, potentially leading to complete device compromise, establishment of persistent access, or use of the compromised device as an entry point for further network attacks.
Remediation
- Update to Realtek Jungle SDK version 3.4.14B or later, which contains patches for these vulnerabilities.
- If immediate updating is not possible, consider implementing network segmentation to restrict access to affected devices.
- Disable the MP Daemon/UDPServer service if it's not required for operation.
- Implement firewall rules to block unauthorized access to the service.
- Monitor network traffic for suspicious activities targeting UDP services on affected devices.
- Device manufacturers using the affected SDK should issue firmware updates incorporating the patched SDK version.
References
- IoT Inspector Advisory: https://www.iot-inspector.com/blog/advisory-multiple-issues-realtek-sdk-iot-supply-chain
- Realtek Security Advisory: https://www.realtek.com/images/safe-report/Realtek_APRouter_SDK_Advisory-CVE-2021-35392_35395.pdf
- SecurityFocus Archive: https://www.securityfocus.com/archive/1/534765
- Realtek Contact Information: https://www.realtek.com/en/cu-1-en/cu-1-taiwan-en
Early Warning
Armis Early Warning customers received an advanced alert on this vulnerability.
- Armis Alert Date
- Aug 31, 2021
- CISA KEV Date
- Dec 10, 2021
101days early
Industry ExposureMost to leastThis section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
This section illustrates the prevalence of a specific Common Vulnerabilities and Exposures (CVE) across various industries based on customer reports. The ranking displays industries from the most to least affected by this particular vulnerability, offering valuable insight into where this CVE has been most frequently observed. This information can help organizations within these sectors prioritize their security efforts, understand their relative risk exposure compared to their peers, and focus remediation strategies where they are most needed. By understanding the industry-specific impact, organizations can make more informed decisions regarding patching, resource allocation, and overall risk management related to this CVE.
- Accommodation & Food ServicesAccommodation & Food Services
- Administrative, Support, Waste Management & Remediation ServicesAdministrative, Support, Waste Management & Remediation Services
- Agriculture, Forestry Fishing & HuntingAgriculture, Forestry Fishing & Hunting
- Arts, Entertainment & RecreationArts, Entertainment & Recreation
- ConstructionConstruction
- Educational ServicesEducational Services
- Finance and InsuranceFinance and Insurance
- Health Care & Social AssistanceHealth Care & Social Assistance
- InformationInformation
- Management of Companies & EnterprisesManagement of Companies & Enterprises
- ManufacturingManufacturing
- MiningMining
- Other Services (except Public Administration)Other Services (except Public Administration)
- Professional, Scientific, & Technical ServicesProfessional, Scientific, & Technical Services
- Public AdministrationPublic Administration
- Real Estate Rental & LeasingReal Estate Rental & Leasing
- Retail TradeRetail Trade
- Transportation & WarehousingTransportation & Warehousing
- UtilitiesUtilities
- Wholesale TradeWholesale Trade
