| tiêu đề | D-Link DIR822A_101 A_101 Stack-based Buffer Overflow |
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| Mô tả | A stack-based buffer overflow vulnerability exists in the `udhcpcd` DHCP server of D-Link DIR-822A. The issue is located in the TR-111 parsing routine for DHCP vendor-specific option 125, where attacker-controlled suboption data is copied into fixed-size stack buffers using `strcpy()` even though the source data is length-delimited DHCP option content rather than a NUL-terminated C string.
Because the vulnerable path is reachable from unauthenticated DHCP client traffic on the local network, a remote attacker on the LAN can trigger memory corruption by sending a crafted DHCP message containing a malicious option 125 payload. |
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| Nguồn | ⚠️ https://tzh00203.notion.site/D-Link-DIR-822A-Stack-Overflow-in-udhcpd-TR-111-Option-125-Parsing-33cb5c52018a80238b80e89e7c7c68f0 |
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| Người dùng | tian (UID 93438) |
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| Đệ trình | 27/07/2026 11:27 (cách đây 1 tháng) |
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| Kiểm duyệt | 06/09/2026 18:15 (1 month later) |
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| Trạng thái | được chấp nhận |
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| Mục VulDB | 399458 [D-Link DIR-822A A_101 udhcpcd udhcpcd/serverpacket.c strcpy tràn bộ đệm] |
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| điểm | 17 |
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