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CVE-2021-27706

Description

Buffer Overflow in Tenda G1 and G3 routers with firmware version V15.11.0.17(9502)_CN allows remote attackers to execute arbitrary code via a crafted action/"IPMacBindIndex "request. This occurs because the "formIPMacBindDel" function directly passes the parameter "IPMacBindIndex" to strcpy without limit.

POC

Reference

- https://hackmd.io/BhzJ4H20TjqKUiBrDOIKaw

Github

- https://github.com/attilaszia/linux-iot-cves