| 标题 | Tenda W20E US_W20EV4.0br_V15.11.0.6(1068_1546_841)_CN_TDC.bin Buffer Overflow |
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| 描述 | 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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| 来源 | ⚠️ https://github.com/paueger/mycve/blob/main/Tenda_W20E/4.md |
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| 用户 | paxiot (UID 94927) |
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| 提交 | 2026-06-25 11時33分 (2 月前) |
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| 管理 | 2026-08-14 07時30分 (2 months later) |
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| 状态 | 已接受 |
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| VulDB条目 | 389956 [Tenda W20E 15.11.0.6(1068_1546_841)_CN_TDC QoS Rule Deletion /goform/delQos formQOSRuleDel qosIndex 内存损坏] |
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| 积分 | 20 |
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