Gửi #1044963: DrayTek Vigor2960 Vigor2960 1.5.1.6 (revision 8218) Authenticated check_file_exist Heap Memory Corruption
| tiêu đề | DrayTek Vigor2960 Vigor2960 1.5.1.6 (revision 8218) Authenticated check_file_exist Heap Memory Corruption |
|---|---|
| Mô tả | check_file_exist appends the user-controlled upload_name to the buffer associated with another CGI parameter without checking the destination capacity. The current PoC uses the device's existing valid UCI package /etc/config-default/general_conf: an 8-byte upload_name returns normal JSON, while a 0x100-byte input makes the same CGI request return an empty body. A previously captured ARM core further confirms memory corruption and a SIGSEGV during CGI cleanup. Affected interface: POST /cgi-bin/mainfunction.cgi with action=check_file_exist Attacker-controlled parameter: upload_name Confirmed impact: an authenticated attacker can corrupt CGI process memory and crash the current mainfunction.cgi process. ## Vendor Confirmation The vulnerability has been officially confirmed. The email is available at: https://github.com/yikesoftware/DrayTek_Vigor2960_Security_Analysis/tree/main/vendor_confirm The official fix for this vulnerability has been released: https://fw.draytek.com.tw/Vigor2960/Firmware/v1.5.1.7/Vigor2960_v1.5.1.7.zip |
| Nguồn | ⚠️ https:/ |
| Người dùng | eqqie (UID 101441) |
| Đệ trình | 20/10/2026 08:16 (cách đây 26 ngày) |
| Kiểm duyệt | 14/11/2026 19:13 (25 days later) |
| Trạng thái | được chấp nhận |
| Mục VulDB | 437464 [DrayTek Vigor2960 1.5.1.6 File Existence Check mainfunction.cgi check_file_exist upload_name tràn bộ đệm] |
| điểm | 20 |