mDNS Fuzzer

This directory contains several fuzzers for the mDNS project in mDNSMacOSX/Tests/Fuzzing

Each fuzzer is named after the routine that it fuzzes.

• dns_wire_parse
• icmp_callback
• mDNS_snprintf

Building

To build it, run the following command from the mDNSMacOSX directory:

$ cd mDNSMacOSX
$ Tests/Fuzzing/dns_wire_parse.sh

Running

To make things simple, you can add the Build/Products directory to your $PATH.

$ OUTPUT=$(echo $HOME/Library/Developer/Xcode/DerivedData/mDNSResponder-*/Build/Products/Debug)
$ export PATH=$OUTPUT:$PATH

Create a corpus directory to store fuzzer test-cases, and an

$ mkdir corpus
$ fuzz-dns-wire-parse corpus

To reproduce a crash, just pass it on the command line

$ fuzz-dns-wire-parse crash-095ab8b59498220df930c19e80fd692a1eebaf8c