| Título | Tenda HG9 V300001138 Stack-based Buffer Overflow |
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| Descripción | During a security review of the Tenda HG9 router firmware (version V300001138), a critical stack-based buffer overflow vulnerability was identified in the Wireless configuration endpoint /boaform/formWlanSetup.
The vulnerability is located in the formWlanSetup function, which handles requests related to wireless LAN settings. The function retrieves the user-controlled ssid parameter via boaGetVar. It subsequently uses the unsafe strcpy function to copy the ssid value into a fixed-size stack buffer v56 (33 bytes) and v50 (270 bytes). Since the input length is not validated, an attacker can send a crafted request with an SSID longer than 33 bytes to overwrite the stack frame, leading to a Denial of Service (DoS) or arbitrary code execution. |
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| Fuente | ⚠️ https://github.com/QIU-DIE/cve-nneeww/issues/7 |
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| Usuario | LINXI666 (UID 91556) |
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| Sumisión | 2026-02-10 08:00 (hace 8 meses) |
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| Moderación | 2026-02-20 21:14 (11 days later) |
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| Estado | Aceptado |
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| Entrada de VulDB | 347214 [Tenda HG9 300001138 Wireless Configuration Endpoint /boaform/formWlanSetup ssid desbordamiento de búfer] |
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| Puntos | 20 |
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