| 标题 | Tenda A21 V1.0.0.0 Stack-based Buffer Overflow |
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| 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 MAC filtering configuration endpoint /goform/setBlackRule.
The vulnerability is triggered within the set_device_name function, which is called by the primary request handler formAddMacfilterRule. The function set_device_name takes the user-supplied devName and mac parameters and attempts to store the device information. Specifically, it uses the unsafe sprintf function to concatenate the dev_name string into a fixed-size stack buffer mib_vlaue (256 bytes). An attacker can provide an excessively long devName parameter to overflow this buffer, corrupt the stack, and gain control over the instruction pointer. |
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| 来源 | ⚠️ https://github.com/QIU-DIE/cve-nneeww/issues/3 |
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| 用户 | hhsw34 (UID 91076) |
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| 提交 | 2026-02-09 12時41分 (8 月前) |
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| 管理 | 2026-02-20 15時41分 (11 days later) |
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| 状态 | 已接受 |
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| VulDB条目 | 347109 [Tenda A21 1.0.0.0 MAC Filtering Configuration Endpoint /goform/setBlackRule set_device_name devName/mac 内存损坏] |
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| 积分 | 20 |
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