Angora is a mutation-based fuzzer. The main goal of Angora is to increase branch coverage by solving path constraints without symbolic execution.

Related tags

Deep Learningsecuritysymbolic-executionfuzzingafltaint-analysisfuzzerdata-flow-analysis
Overview

Angora

License Build Status

Angora is a mutation-based coverage guided fuzzer. The main goal of Angora is to increase branch coverage by solving path constraints without symbolic execution.

Published Work

Arxiv: Angora: Efficient Fuzzing by Principled Search, S&P 2018.

Building Angora

Build Requirements

  • Linux-amd64 (Tested on Ubuntu 16.04/18.04 and Debian Buster)
  • Rust stable (>= 1.31), can be obtained using rustup
  • LLVM 4.0.0 - 7.1.0 : run PREFIX=/path-to-install ./build/install_llvm.sh.

Environment Variables

Append the following entries in the shell configuration file (~/.bashrc, ~/.zshrc).

export PATH=/path-to-clang/bin:$PATH
export LD_LIBRARY_PATH=/path-to-clang/lib:$LD_LIBRARY_PATH

Fuzzer Compilation

The build script will resolve most dependencies and setup the runtime environment.

./build/build.sh

System Configuration

As with AFL, system core dumps must be disabled.

echo core | sudo tee /proc/sys/kernel/core_pattern

Test

Test if Angora is builded successfully.

cd /path-to-angora/tests
./test.sh mini

Running Angora

Build Target Program

Angora compiles the program into two separate binaries, each with their respective instrumentation. Using autoconf programs as an example, here are the steps required.

# Use the instrumenting compilers
CC=/path/to/angora/bin/angora-clang \
CXX=/path/to/angora/bin/angora-clang++ \
LD=/path/to/angora/bin/angora-clang \
PREFIX=/path/to/target/directory \
./configure --disable-shared

# Build with taint tracking support 
USE_TRACK=1 make -j
make install

# Save the compiled target binary into a new directory
# and rename it with .taint postfix, such as uniq.taint

# Build with light instrumentation support
make clean
USE_FAST=1 make -j
make install

# Save the compiled binary into the directory previously
# created and rename it with .fast postfix, such as uniq.fast

If you fail to build by this approach, try wllvm and gllvm described in Build a target program.

Also, we have implemented taint analysis with libdft64 instead of DFSan (Use libdft64 for taint tracking).

Fuzzing

./angora_fuzzer -i input -o output -t path/to/taint/program -- path/to/fast/program [argv]

For more information, please refer to the documentation under the docs/ directory.

Comments
  • Unable to compile lavam programs correctly

    Unable to compile lavam programs correctly

    Hello Angora authors,

    I'm trying to reproduce the lavam evaluation within Magma's infrastructure. However, I think I encounter the following 2 issues. Could you help me to check if I'm doing anything wrong?

    Thank you in advance!

    The 2 issues are as follow:

    1. Angora cannot find any bugs while AFLplusplus can easily discover ones within a few minutes. From the log files I see that Angora is saying Multiple inconsistent warnings. It caused by the fast and track programs has different behaviors. If most constraints are inconsistent, ensure they are compiled with the same environment. Otherwise, please report us.
    2. For who, AFLplusplus can only find <20 bugs after running for 5 hours. For other targets it is finding the numbers of bugs reported in your paper.

    You can find the scripts I use to compile and run the fuzzing campaigns here. Basically, the lavam programs are compiled with fuzzers/aflplusplus/instrument.sh and fuzzers/angora/instrument.sh, which they set up some config and execute targets/lavam/build.sh.
    In targets/lavam/LAVAM you can find the patched source code following your instructions.

    To launch the fuzzing campaigns, cd into tools/captain and run ./run.sh run_lavamrc.
    run_lavamrc is the config file for the campaign. It would create a working directory in ~/lavam-results, build docker containers and start fuzzing with fuzzers/aflplusplus/run.sh and fuzzers/angora/run.sh. The fuzzing results are stored in ~/lavam-results/ar as tarballs.

    Please do let me know if you need any additional information.

    Spencer

    opened by spencerwuwu 1
  • Fix up compiler warnings

    Fix up compiler warnings

    • Correct signedness for c-strings in angora-clang
    • Const-correctness throughout
    • Move #[link] attribute to extern block

    Fixes all warnings emitted by clang version 14.

    opened by bossmc 0
  • Upgrade to GitHub-native Dependabot

    Upgrade to GitHub-native Dependabot

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    dependencies 
    opened by dependabot-preview[bot] 1
  • Angora compile IR

    Angora compile IR

    Would Angora have support to compile from LLVM or BAP derived intermediate representation?

    Trying to analyze binary (pre-compiled) but couldn't figure out how:

     INFO  angora::fuzz_main > CommandOpt { mode: LLVM, id: 0, main: ("/input/azorult2", []), track: ("/input/azorult2", []), tmp_dir: "./output/bar/tmp", out_file: "./output/bar/tmp/cur_input", forksrv_socket_path: "./output/bar/tmp/forksrv_socket", track_path: "./output/bar/tmp/track", is_stdin: true, search_method: Gd, mem_limit: 200, time_limit: 1, is_raw: true, uses_asan: false, ld_library: "$LD_LIBRARY_PATH:/clang+llvm/lib", enable_afl: true, enable_exploitation: true }
thread 'main' panicked at 'The program is not complied by Angora', fuzzer/src/check_dep.rs:55:9
    opened by aug2uag 1
  • Update rand requirement from 0.7 to 0.8

    Update rand requirement from 0.7 to 0.8

    Updates the requirements on rand to permit the latest version.

    Changelog

    Sourced from rand's changelog.

    [0.8.0] - 2020-12-18

    Platform support

    • The minimum supported Rust version is now 1.36 (#1011)
    • getrandom updated to v0.2 (#1041)
    • Remove wasm-bindgen and stdweb feature flags. For details of WASM support, see the getrandom documentation. (#948)
    • ReadRng::next_u32 and next_u64 now use little-Endian conversion instead of native-Endian, affecting results on Big-Endian platforms (#1061)
    • The nightly feature no longer implies the simd_support feature (#1048)
    • Fix simd_support feature to work on current nightlies (#1056)

    Rngs

    • ThreadRng is no longer Copy to enable safe usage within thread-local destructors (#1035)
    • gen_range(a, b) was replaced with gen_range(a..b). gen_range(a..=b) is also supported. Note that a and b can no longer be references or SIMD types. (#744, #1003)
    • Replace AsByteSliceMut with Fill and add support for [bool], [char], [f32], [f64] (#940)
    • Restrict rand::rngs::adapter to std (#1027; see also #928)
    • StdRng: add new std_rng feature flag (enabled by default, but might need to be used if disabling default crate features) (#948)
    • StdRng: Switch from ChaCha20 to ChaCha12 for better performance (#1028)
    • SmallRng: Replace PCG algorithm with xoshiro{128,256}++ (#1038)

    Sequences

    • Add IteratorRandom::choose_stable as an alternative to choose which does not depend on size hints (#1057)
    • Improve accuracy and performance of IteratorRandom::choose (#1059)
    • Implement IntoIterator for IndexVec, replacing the into_iter method (#1007)
    • Add value stability tests for seq module (#933)

    Misc

    • Support PartialEq and Eq for StdRng, SmallRng and StepRng (#979)
    • Added a serde1 feature and added Serialize/Deserialize to UniformInt and WeightedIndex (#974)
    • Drop some unsafe code (#962, #963, #1011)
    • Reduce packaged crate size (#983)
    • Migrate to GitHub Actions from Travis+AppVeyor (#1073)

    Distributions

    • Alphanumeric samples bytes instead of chars (#935)
    • Uniform now supports char, enabling rng.gen_range('A'..='Z') (#1068)
    • Add UniformSampler::sample_single_inclusive (#1003)

    Weighted sampling

    • Implement weighted sampling without replacement (#976, #1013)
    • rand::distributions::alias_method::WeightedIndex was moved to rand_distr::WeightedAliasIndex. The simpler alternative rand::distribution::WeightedIndex remains. (#945)
    • Improve treatment of rounding errors in WeightedIndex::update_weights (#956)
    • WeightedIndex: return error on NaN instead of panic (#1005)

    Documentation

    • Document types supported by random (#994)
    Commits

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    dependencies 
    opened by dependabot-preview[bot] 0
  • showmap: added tool for displaying coverage data

    showmap: added tool for displaying coverage data

    Analogous to afl-showmap. Logs code coverage information to a file (in the same format as afl-showmap).

    This is my first time writing Rust, so I hope that it's okay!

    opened by adrianherrera 0
Releases(1.3.0)

  • 1.3.0(Apr 13, 2022)

    • Support LLVM 11/12
    • Tested in Rust 1.6.*, and Ubuntu 20.04
    • Fix issues
      • getc model
      • https://github.com/AngoraFuzzer/Angora/commit/b31af93bb7401a296af0ddaa7b80eaaed7f73415
      • https://github.com/AngoraFuzzer/Angora/issues/86
    • New PRs
    Source code(tar.gz)
    Source code(zip)

  • 1.2.2(Jul 17, 2019)

    • Implementation of Never-zero counter: The idea is from Marc and Heiko in AFLPlusPlus . https://github.com/vanhauser-thc/AFLplusplus/blob/master/llvm_mode/README.neverzero

    • add inst_ratio : issue #67

    • fix asan compatible: did not instrument function startswith "asan.module"

    Source code(tar.gz)
    Source code(zip)

  • 1.2.1(Jun 14, 2019)

  • 1.2.0(May 23, 2019)

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