| 제목 | Totolink A3300R 17.0.0cu.557_b20221024 Command Injection |
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| 설명 | The vulnerability resides in the router's shttpdweb service. A remote, unauthenticated attacker can exploit this flaw to execute arbitrary operating system commands on the device by sending a specially crafted HTTP request, potentially leading to a complete compromise.
The technical root cause is the unsafe handling of user input within the firmware's code. The exploit chain is visually summarized in the provided vulnerability trigger flow diagram:
Malicious Input Entry Point: The attack begins when a user-controlled parameter named "rtLogServer" is processed. The function sub_423718reads the value provided by the attacker in the request.
Parameter Passing: This value of "rtLogServer" is then passed to the Uci_Set_Strfunction for further processing.
Unsafe Command Construction: Crucially, the value of the rtLogServerparameter is directly inserted into a command buffer (v11) using the snprintffunction without proper sanitization or validation.
Arbitrary Command Execution: This constructed command string is subsequently passed to the CsteSystem function, where it is executed via the execv() system call. |
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| 원천 | ⚠️ https://github.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_rtLogServer_cmd_inject |
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| 사용자 | LvHW (UID 96399) |
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| 제출 | 2026. 03. 13. AM 03:45 (24 날 ago) |
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| 모더레이션 | 2026. 03. 30. PM 08:53 (18 days later) |
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| 상태 | 수락 |
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| VulDB 항목 | 354244 [Totolink A3300R 17.0.0cu.557_b20221024 /cgi-bin/cstecgi.cgi setSyslogCfg provided 권한 상승] |
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| 포인트들 | 20 |
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