Gửi #836469: Tenda W20E Enterprise Router V15.11.0.6 Stack-based Buffer Overflow

A stack-based buffer overflow vulnerability has been identified in the formSetPortMirror function of the Tenda W20E router. By sending a crafted portMirrorMirroredPorts parameter, an authenticated attacker can overflow a 256-byte stack buffer, leading to a service crash or Remote Code Execution (RCE).
The formSetPortMirror function handles port mirroring configuration. It retrieves the user-controlled parameter portMirrorMirroredPorts and uses sprintf to format it into a fixed-size stack buffer sMibValue (256 bytes).

The lack of bounds checking on pMirroredPorts allows an attacker to provide a string longer than 256 bytes, overwriting the saved Link Register (LR) on the stack.

• Nguồn: ⚠️ https://github.com/Robots10/IoT_vlu/blob/main/reports/Tenda/formSetPortMirror/portMirrorMirroredPorts.md
• Người dùng: hacker128 (UID 93883)
• Đệ trình: 24/05/2026 17:22 (cách đây 16 ngày)
• Kiểm duyệt: 07/06/2026 18:06 (14 days later)
• Trạng thái: được chấp nhận
• Mục VulDB: 369142 [Tenda W20E 15.11.0.6 /goform/setPortMirror formSetPortMirror portMirrorMirroredPorts tràn bộ đệm]
• điểm: 20