TAP: A static analysis model for PHP vulnerabilities based on token and deep learning technology


Autoři: Yong Fang aff001;  Shengjun Han aff001;  Cheng Huang aff001;  Runpu Wu aff002
Působiště autorů: College of Cybersecurity, Sichuan University, Chengdu 610065, China aff001;  China Information Technology Security Evaluation Center, Beijing 100085, China aff002
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
doi: 10.1371/journal.pone.0225196

Souhrn

With the widespread usage of Web applications, the security issues of source code are increasing. The exposed vulnerabilities seriously endanger the interests of service providers and customers. There are some models for solving this problem. However, most of them rely on complex graphs generated from source code or regex patterns based on expert experience. In this paper, TAP, which is based on token mechanism and deep learning technology, was proposed as an analysis model to discover the vulnerabilities of PHP: Hypertext Preprocessor (PHP) Web programs conveniently and easily. Based on the token mechanism of PHP language, a custom tokenizer was designed, and it unifies tokens, supports some features of PHP and optimizes the parsing. Besides, the tokenizer also implements parameter iteration to achieve data flow analysis. On the Software Assurance Reference Dataset(SARD) and SQLI-LABS dataset, we trained the deep learning model of TAP by combining the word2vec model with Long Short-Term Memory (LSTM) network algorithm. According to the experiment on the dataset of CWE-89, TAP not only achieves the 0.9941 Area Under the Curve(AUC), which is better than other models, but also achieves the highest accuracy: 0.9787. Further, compared with RIPS, TAP shows much better in multiclass classification with 0.8319 Kappa and 0.0840 hamming distance.

Klíčová slova:

Deep learning – Graphs – Internet – Machine learning – Memory recall – National security – Source code – Web-based applications


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Článek vyšel v časopise

PLOS One


2019 Číslo 11