| Название | Tenda W20E US_W20EV4.0br_V15.11.0.6(1068_1546_841)_CN_TDC.bin Buffer Overflow |
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| Описание | 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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| Источник | ⚠️ https://github.com/paueger/mycve/blob/main/Tenda_W20E/4.md |
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| Пользователь | paxiot (UID 94927) |
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| Представление | 25.06.2026 11:33 (2 месяцы назад) |
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| Модерация | 14.08.2026 07:30 (2 months later) |
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| Статус | принято |
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| Запись VulDB | 389956 [Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC QoS Rule Deletion /goform/delQos formQOSRuleDel qosIndex повреждение памяти] |
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| Баллы | 20 |
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