| tiêu đề | Tenda W20E US_W20EV4.0br_V15.11.0.6(1068_1546_841)_CN_TDC.bin Buffer Overflow |
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| Mô tả | Tenda W20E firmware V4.0br_V15.11.0.6(1068_1546_841)_CN_TDC contains a stack-based buffer overflow in formQOSRuleDel, reachable via POST /goform/delQos. The attacker-controlled qosIndex parameter is copied with strcpy into the fixed-size input.src[1024] stack buffer without bounds checking. Local reproduction with an 8192-byte qosIndex reached strcpy@0x0006d138 and resulted in httpd_exit:-11 together with a fresh core dump, demonstrating that an authenticated attacker can trigger memory corruption and crash the httpd service.
PoC:
curl -i 'http://192.168.0.1/goform/delQos' -b cookies.txt \
--data-urlencode "qosIndex=$(python3 -c 'print(\"9\"*8192)')" |
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| Nguồn | ⚠️ https://github.com/paueger/mycve/blob/main/Tenda_W20E/4.md |
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| Người dùng | paxiot (UID 94927) |
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| Đệ trình | 25/06/2026 11:33 (cách đây 4 các tháng) |
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| Kiểm duyệt | 14/08/2026 07:30 (2 months later) |
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| Trạng thái | được chấp nhận |
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| Mục VulDB | 389956 [Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC QoS Rule Deletion /goform/delQos formQOSRuleDel qosIndex tràn bộ đệm] |
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| điểm | 20 |
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