| 标题 | Tenda TX9 V22.03.02.18 Stack-based Buffer Overflow |
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| 描述 | During a security review of the Tenda TX9 router firmware (version V22.03.02.18), a critical stack-based buffer overflow vulnerability was identified in the MAC filtering configuration endpoint /goform/setMacFilterCfg.
The vulnerability resides in the sub_423B50 function (responsible for parsing MAC filter rules). This function is triggered when a user submits a configuration request via the deviceList parameter. The function uses strchr to locate a carriage return character (\r, ASCII 13) within the user-provided string. Once found, it employs the unsafe strcpy function to copy the split substrings into a fixed-size stack buffer v15 (160 bytes). Since the length of the input strings is not validated before the copy operation, an attacker can provide a specially crafted long string to overwrite the stack frame, including the return address, leading to a Denial of Service (DoS) or potential Remote Code Execution (RCE). |
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| 来源 | ⚠️ https://github.com/LX-66-LX/cve-new/issues/9 |
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| 用户 | LX-66-LX (UID 92717) |
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| 提交 | 2026-01-31 13時41分 (8 月前) |
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| 管理 | 2026-02-07 18時20分 (7 days later) |
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| 状态 | 重复 |
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| VulDB条目 | 344775 [Tenda TX9 直到 22.03.02.10_multi /goform/setMacFilterCfg sub_4223E0 deviceList 内存损坏] |
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| 积分 | 0 |
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