Description Preview
A critical stack buffer overflow vulnerability (CVE-2020-27301) affects Realtek RTL8710 and other Ameba-based Wi-Fi devices. The vulnerability exists in the "AES_UnWRAP" function that processes the "Encrypted GTK" value during the WPA2 4-way handshake. An attacker within Wi-Fi range can exploit this vulnerability by sending a specially crafted "Encrypted GTK" value, potentially leading to remote code execution on the affected device without requiring authentication.
Overview
This vulnerability (CWE-787: Out-of-bounds Write) affects the Wi-Fi implementation in Realtek RTL8710 and other similar Ameba-based devices. The issue occurs during the WPA2 4-way handshake process, specifically when processing the "Encrypted GTK" (Group Temporal Key) value. The "AES_UnWRAP" function responsible for decrypting this value fails to properly validate input size, allowing an attacker to cause a stack buffer overflow. This can lead to memory corruption and potentially allow an attacker to execute arbitrary code on the affected device. The attack can be performed by any malicious actor within Wi-Fi range of the target device, making this a serious threat to IoT devices and embedded systems using the vulnerable Wi-Fi components.
Remediation
- Update device firmware to the latest version provided by the manufacturer that addresses this vulnerability.
- If no patch is available, consider implementing network segmentation to isolate affected devices.
- Monitor network traffic for suspicious WPA2 handshake attempts.
- Contact the device manufacturer for specific patch information if updates are not readily available.
- Consider implementing additional security controls such as MAC address filtering and reducing the Wi-Fi range where possible, although these are not complete solutions.
- For device manufacturers using Realtek RTL8710 or other Ameba-based Wi-Fi components, ensure proper input validation is implemented for the "Encrypted GTK" value during the WPA2 handshake process.
References
- VDOO Security Research Blog: https://www.vdoo.com/blog/realtek-wifi-vulnerabilities-zero-day
- CWE-787: Out-of-bounds Write: https://cwe.mitre.org/data/definitions/787.html
- Realtek Security Advisories (check for latest updates)
- MITRE CVE Entry: CVE-2020-27301
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
