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Computer Science > Cryptography and Security

arXiv:2410.21713 (cs)
[Submitted on 29 Oct 2024]

Title:Fuzzing the PHP Interpreter via Dataflow Fusion

Authors:Yuancheng Jiang, Chuqi Zhang, Bonan Ruan, Jiahao Liu, Manuel
Rigger, Roland Yap, Zhenkai Liang
View a PDF of the paper titled Fuzzing the PHP Interpreter via
Dataflow Fusion, by Yuancheng Jiang and 6 other authors
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    Abstract:PHP, a dominant scripting language in web development,
    powers a vast range of websites, from personal blogs to major
    platforms. While existing research primarily focuses on PHP
    application-level security issues like code injection, memory
    errors within the PHP interpreter have been largely overlooked.
    These memory errors, prevalent due to the PHP interpreter's
    extensive C codebase, pose significant risks to the
    confidentiality, integrity, and availability of PHP servers. This
    paper introduces FlowFusion, the first automatic fuzzing
    framework specifically designed to detect memory errors in the
    PHP interpreter. FlowFusion leverages dataflow as an efficient
    representation of test cases maintained by PHP developers,
    merging two or more test cases to produce fused test cases with
    more complex code semantics. Moreover, FlowFusion employs
    strategies such as test mutation, interface fuzzing, and
    environment crossover to further facilitate memory error
    detection. In our evaluation, FlowFusion identified 56 unknown
    memory errors in the PHP interpreter, with 38 fixed and 4
    confirmed. We compared FlowFusion against the official test suite
    and a naive test concatenation approach, demonstrating that
    FlowFusion can detect new bugs that these methods miss, while
    also achieving greater code coverage. Furthermore, FlowFusion
    outperformed state-of-the-art fuzzers AFL++ and Polyglot,
    covering 24% more lines of code after 24 hours of fuzzing under
    identical execution environments. FlowFusion has been
    acknowledged by PHP developers, and we believe our approach
    offers a practical tool for enhancing the security of the PHP
    interpreter.

Comments: 15 pages, 4 figures
Subjects: Cryptography and Security (cs.CR)
Cite as:  arXiv:2410.21713 [cs.CR]
          (or arXiv:2410.21713v1 [cs.CR] for this version)
          https://doi.org/10.48550/arXiv.2410.21713
          Focus to learn more
          arXiv-issued DOI via DataCite

Submission history

From: Yuancheng Jiang [view email]
[v1] Tue, 29 Oct 2024 03:54:59 UTC (1,541 KB)
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