| Title | Fast FAC1203R Gigabit Edition 20200116_2.0.4 Stack-based Buffer Overflow |
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| Description | A stack-based buffer overflow vulnerability exists in the copy_msg_element function within the firmware's device discovery service. This function calls a memcpy/memmove-like routine when copying message element data, but fails to perform an upper-bound check on a user-controllable length field originating from UDP packets. A specially crafted UDP request to port 5001 can trigger this vulnerability. |
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| Source | ⚠️ https://github.com/xiaobor123/vuls-find-VxWorks/tree/main/vul-find-FAST_FAC1203R-copy_msg_element |
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| User | xiaobor123 (UID 76914) |
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| Submission | 07/22/2026 09:45 (2 months ago) |
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| Moderation | 09/22/2026 21:50 (2 months later) |
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| Status | Accepted |
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| VulDB entry | 408707 [Fast FAC1203R Gigabit Edition 2.0.4 Device Discovery Service copy_msg_element stack-based overflow] |
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| Points | 20 |
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