Fuzzing script for curl

script.sh

#!/bin/bash
# Running a netcat listener on port tcp port 80 in the background
netcat -l 80 -k -w 0 &
export ASAN_OPTIONS=abort_on_error=1:symbolize=0:detect_leaks=0
# Prepare iptables entries
iptables-legacy -t nat -A OUTPUT -p tcp -j REDIRECT --to-port 80
iptables-legacy -t nat -A OUTPUT -p udp --dport 53 -j DNAT --to-destination 127.0.0.1

# Prepare fuzzing directories
mkdir fuzz &&
      cd fuzz &&
      mkdir in out &&
      echo -ne 'curl\x00http://127.0.0.1:80' > in/example_command.txt &&
      # Run afl++ fuzzer
      afl-fuzz -x /AFLplusplus/curl.dict -i in/ -o out/ -- curl