| タイトル | Tenda W20E Enterprise Router V15.11.0.6 Stack-based Buffer Overflow |
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| 説明 | A stack-based buffer overflow vulnerability has been identified in the web management interface of the Tenda W20E enterprise router. An attacker can trigger this vulnerability by sending a maliciously crafted, overly long string within the gotoUrl parameter to the /goform/PortalAuth endpoint. Successful exploitation can result in a service crash (DoS) or Remote Code Execution (RCE) with root privileges.
Under certain conditions , the function attempts to retrieve a user-provided fallback URL using websGetVar(wp, "gotoUrl", ...). The retrieved value is then copied into the redirect_url buffer using the unsafe strcpy function:
Since there is no length validation on the gotoUrl input, an attacker can provide a string significantly longer than 256 bytes. This will overflow the stack buffer, overwriting the saved Link Register (LR/Return Address) and allowing the attacker to hijack the program's control flow. |
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| ソース | ⚠️ https://github.com/Robots10/IoT_vlu/blob/main/reports/Tenda/formPortalAuth/formPortalAuth.md |
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| ユーザー | hacker128 (UID 93883) |
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| 送信 | 2026年05月24日 17:27 (18 日 ago) |
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| モデレーション | 2026年06月07日 18:06 (14 days later) |
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| ステータス | 承諾済み |
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| VulDBエントリ | 369143 [Tenda W20E 15.11.0.6 Web Management Interface /goform/PortalAuth formPortalAuth gotoUrl メモリ破損] |
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| ポイント | 20 |
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