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<h1 id="building-and-testing-clamav-with-fuzzing-sanitizers"><a class="header" href="#building-and-testing-clamav-with-fuzzing-sanitizers">Building and Testing ClamAV with Fuzzing Sanitizers</a></h1>
<h2 id="build--reproduce-fuzz-reports-using-oss-fuzz-tools"><a class="header" href="#build--reproduce-fuzz-reports-using-oss-fuzz-tools">Build & Reproduce Fuzz Reports using OSS-Fuzz Tools</a></h2>
<p>Check out <a href="https://github.com/google/oss-fuzz.git">the google/oss-fuzz repository</a> and the <code>clamav</code> repo side by side. .</p>
<p>Then inside the <code>oss-fuzz</code> directory, run:</p>
<pre><code class="language-bash">python3 infra/helper.py build_image clamav
python3 infra/helper.py build_fuzzers --sanitizer address clamav ../clamav
python3 infra/helper.py reproduce clamav clamav_scanmap_fuzzer /path/to/poc_file
</code></pre>
<blockquote>
<p><em>Tip</em>: You can substitute <code>address</code> argument in the second command that selects the Address Sanitizer (ASan) with <code>memory</code> or <code>undefined</code> to use the Memory Sanitizer (MSan) or the Undefined Behavior Sanitizer (UBSan).</p>
</blockquote>
<p>See <a href="https://google.github.io/oss-fuzz/advanced-topics/reproducing/">https://google.github.io/oss-fuzz/advanced-topics/reproducing/</a> for more details.</p>
<h2 id="build--test-fuzz-targets-sanitizers-in-cmake-v0104-and-newer"><a class="header" href="#build--test-fuzz-targets-sanitizers-in-cmake-v0104-and-newer">Build & Test Fuzz Targets Sanitizers in CMake (v0.104 and newer)</a></h2>
<p>Inside your <code>clamav</code> git clone, run:</p>
<pre><code class="language-bash">mkdir build-fuzz && cd build-fuzz
export CC=`which clang` && \
export CXX=`which clang++` && \
export SANITIZER=address && \
cmake .. -G Ninja \
-D OPTIMIZE=OFF \
-D CMAKE_BUILD_TYPE="Debug" \
-D ENABLE_FUZZ=ON \
&& \
ninja
</code></pre>
<p>This will build the fuzz target executables in the <code>build-fuzz/fuzz/</code> directory. You can run them just like a regular program, passing the file as input.</p>
<p>E.g.:</p>
<pre><code class="language-bash">./fuzz/clamav_scanfile_fuzzer /path/to/poc_file
</code></pre>
<h2 id="clamav-with-address-sanitizer-asan-in-autotools-v0103-and-older"><a class="header" href="#clamav-with-address-sanitizer-asan-in-autotools-v0103-and-older">ClamAV with Address Sanitizer (ASAN) in Autotools (v0.103 and older)</a></h2>
<p>Building ClamAV with ASAN support can be extremely useful in detecting memory corruption and memory leaks. To build with ASAN, use a <code>..\configure</code> line like the following:</p>
<pre><code class="language-bash">CFLAGS="-ggdb -O0 -fsanitize=address -fno-omit-frame-pointer" LDFLAGS="-fsanitize=address" CXXFLAGS="-ggdb -O0 -fsanitize=address -fno-omit-frame-pointer" OBJCFLAGS="-ggdb -O0 -fsanitize=address -fno-omit-frame-pointer" ../configure --prefix=`pwd`/../installed --enable-debug --enable-libjson --with-systemdsystemunitdir=no --enable-experimental --enable-clamdtop --enable-libjson --enable-xml --enable-pcre --disable-llvm
</code></pre>
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Sindbad File Manager Version 1.0, Coded By Sindbad EG ~ The Terrorists