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DOI: 10.4230/LIPIcs.ECOOP.2022.29

Experience: Model-Based, Feedback-Driven, Greybox Web Fuzzing with BackREST

Authors: François Gauthier, Behnaz Hassanshahi, Benjamin Selwyn-Smith, Trong Nhan Mai, Max Schlüter, and Micah Williams

Published in: LIPIcs, Volume 222, 36th European Conference on Object-Oriented Programming (ECOOP 2022)

Abstract

Following the advent of the American Fuzzy Lop (AFL), fuzzing had a surge in popularity, and modern day fuzzers range from simple blackbox random input generators to complex whitebox concolic frameworks that are capable of deep program introspection. Web application fuzzers, however, did not benefit from the tremendous advancements in fuzzing for binary programs and remain largely blackbox in nature. In this experience paper, we show how techniques like state-aware crawling, type inference, coverage and taint analysis can be integrated with a black-box fuzzer to find more critical vulnerabilities, faster (speedups between 7.4× and 25.9×). Comparing BackREST against three other web fuzzers on five large (>500 KLOC) Node.js applications shows how it consistently achieves comparable coverage while reporting more vulnerabilities than state-of-the-art. Finally, using BackREST, we uncovered eight 0-days, out of which six were not reported by any other fuzzer. All the 0-days have been disclosed and most are now public, including two in the highly popular Sequelize and Mongodb libraries.

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François Gauthier, Behnaz Hassanshahi, Benjamin Selwyn-Smith, Trong Nhan Mai, Max Schlüter, and Micah Williams. Experience: Model-Based, Feedback-Driven, Greybox Web Fuzzing with BackREST. In 36th European Conference on Object-Oriented Programming (ECOOP 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 222, pp. 29:1-29:30, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022)

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@InProceedings{gauthier_et_al:LIPIcs.ECOOP.2022.29,
  author =	{Gauthier, Fran\c{c}ois and Hassanshahi, Behnaz and Selwyn-Smith, Benjamin and Mai, Trong Nhan and Schl\"{u}ter, Max and Williams, Micah},
  title =	{{Experience: Model-Based, Feedback-Driven, Greybox Web Fuzzing with BackREST}},
  booktitle =	{36th European Conference on Object-Oriented Programming (ECOOP 2022)},
  pages =	{29:1--29:30},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-225-9},
  ISSN =	{1868-8969},
  year =	{2022},
  volume =	{222},
  editor =	{Ali, Karim and Vitek, Jan},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ECOOP.2022.29},
  URN =		{urn:nbn:de:0030-drops-162573},
  doi =		{10.4230/LIPIcs.ECOOP.2022.29},
  annote =	{Keywords: Taint analysis, fuzzing, crawler, Node.js}
}

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Experience: Model-Based, Feedback-Driven, Greybox Web Fuzzing with BackREST

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