| 标题 | Tenda A21 V1.0.0.0 Stack-based Buffer Overflow |
|---|
| 描述 | During a security review of the Tenda A21 router firmware (version V1.0.0.0), a critical stack-based buffer overflow vulnerability was identified in the Wi-Fi configuration endpoint /goform/fast_setting_wifi_set.
The vulnerability exists within the form_fast_setting_wifi_set function. This function retrieves the user-controlled parameter ssid via the websGetVar interface and processes it into a fixed-size stack buffer ssid_5g (64 bytes). Due to the use of the unsafe sprintf function without length validation, an attacker can provide an overly long SSID to overwrite the stack, leading to a Denial of Service (DoS) or arbitrary code execution with root privileges. |
|---|
| 来源 | ⚠️ https://github.com/QIU-DIE/cve-nneeww/issues/5 |
|---|
| 用户 | hhsw34 (UID 91076) |
|---|
| 提交 | 2026-02-09 12時46分 (8 月前) |
|---|
| 管理 | 2026-02-20 15時41分 (11 days later) |
|---|
| 状态 | 已接受 |
|---|
| VulDB条目 | 347111 [Tenda A21 1.0.0.0 fast_setting_wifi_set form_fast_setting_wifi_set ssid 内存损坏] |
|---|
| 积分 | 20 |
|---|