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README.md

Fuzzing Apache 2.4

Requirements

  • honggfuzz
  • clang-4.0, or newer (5.0 works as well)
  • apache (e.g. 2.4.29 or from githubs' master branch)
  • apr, apr-utils, nghttp2

Preparation

Note: The examples provided below use hardcoded paths (here to /home/$USER/) and version strings of the libraries (e.g. apr-1.5.2). These will have to be modified, so they reflect your actual build environment.

  1. Compile honggfuzz
  2. Download and unpack the following packages: apr, apr-util, ngttp2, and Apache's httpd
  3. Patch Apache's httpd
$ cd httpd-master
$ patch -p1 < httpd-master.honggfuzz.patch
  1. Configure, compile and install Apache
  • edit compile_and_install.asan.sh so it contains valid versions/paths
$ ./compile_and_install.asan.sh
  1. Copy custom configuration files (httpd.conf.h1 and httpd.conf.h2) to /home/$USER/fuzz/apache/apache2/conf/ (i.e. to your apache dist directory)
$ cp httpd.conf.h1 httpd.conf.h2 /home/$USER/fuzz/apache/apache2/conf/
  1. Edit httpd.conf.h1 and httpd.conf.h2, so they contain valid configuration paths

Fuzzing

  • HTTP/1
$ honggfuzz/honggfuzz -f corpus_http1 -w ./httpd.wordlist -- ./apache2/bin/httpd -DFOREGROUND -f  /home/$USER/fuzz/apache/apache2/conf/httpd.conf.h1
  • HTTP/2
$ honggfuzz/honggfuzz -f corpus_http2 -w ./httpd.wordlist -- ./apache2/bin/httpd -DFOREGROUND -f /home/$USER/fuzz/apache/apache2/conf/httpd.conf.h2