IQID:24675 Tenda M3 V1.0.0.12 'fromDhcpListClient' - Buffer Overflow S

IQID: 24675 - July 2022

httpd in directory /bin has a stack overflow vulnerability. The vulnerability occurrs in the fromDhcpListClient function, which can be accessed via the URL goform/DhcpListClient. The POST parameter listN is concatenated. The program copies the POST argument without checking the length. We can set LISTEN equal to 1, the program will enter the red box, causing a stack overflow. Since the overflow overrides the LISTEN pointer variable, the atoi function will crash the program, causing a DOS attack in the second time looping.

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