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Threat Model Analysis for dromara/hutool

Threat: Dependency Vulnerabilities

  • Threat: Known Vulnerabilities in Hutool or Dependencies
    • Description: Hutool library or its transitive dependencies contain publicly known vulnerabilities. Attackers exploit these vulnerabilities, which are inherent to the library code itself, without requiring specific developer misuse.
    • Impact: Remote Code Execution (RCE), Denial of Service (DoS), data breaches, unauthorized access to sensitive information or system resources.
    • Hutool Component Affected: Core library, all modules, transitive dependencies.
    • Risk Severity: Critical to High (depending on the vulnerability and exploitability).
    • Mitigation Strategies:
      • Regularly update Hutool to the latest stable version to patch known vulnerabilities.
      • Utilize dependency scanning tools specifically configured to check for vulnerabilities in Hutool and its dependencies.
      • Subscribe to security advisories related to Hutool and its ecosystem to be promptly informed of new vulnerabilities.

Threat: hutool-xml Module Threats - XML External Entity (XXE) Injection

  • Threat: XML External Entity (XXE) Injection via XmlUtil
    • Description: Hutool's XmlUtil or related XML parsing utilities might use default configurations that are vulnerable to XXE injection. Attackers can exploit this by providing maliciously crafted XML input that, when parsed by Hutool, allows them to access local files, perform Server-Side Request Forgery (SSRF), or cause Denial of Service (DoS). This threat is directly related to how Hutool configures or uses underlying XML parsing libraries.
    • Impact: Local file disclosure, Server-Side Request Forgery (SSRF), Denial of Service (DoS), potentially Remote Code Execution in some scenarios.
    • Hutool Component Affected: XmlUtil, SAXReaderUtil, DocumentUtil.
    • Risk Severity: High to Critical (depending on exploitability and impact).
    • Mitigation Strategies:
      • Immediately configure Hutool's XML parsing to disable external entity processing. This should be a default security configuration applied when using XmlUtil. Refer to Hutool documentation for specific configuration methods to disable external entity resolution.
      • If external entities are absolutely necessary (which is rarely the case), implement strict input validation and sanitization of XML data to neutralize or remove potentially malicious entities before parsing with Hutool.
      • Consider using alternative XML parsing approaches that are inherently less vulnerable to XXE if possible.

Threat: hutool-crypto Module Threats - Use of Weak or Insecure Cryptographic Algorithms

  • Threat: Weak Cryptography due to Hutool API Defaults or Recommendations
    • Description: Hutool's CryptoUtil or other crypto components might default to or recommend the use of weak or outdated cryptographic algorithms or modes. Developers following Hutool's examples or default settings could inadvertently implement weak cryptography, making their applications vulnerable. This threat arises from potentially insecure defaults or guidance within Hutool itself.
    • Impact: Data breaches, unauthorized access to encrypted data, compromise of authentication or authorization mechanisms due to easily breakable encryption.
    • Hutool Component Affected: CryptoUtil, SymmetricCrypto, AsymmetricCrypto, SecureUtil.
    • Risk Severity: High to Critical (depending on the sensitivity of data protected).
    • Mitigation Strategies:
      • Do not rely on default cryptographic algorithms or modes provided by Hutool without careful security review. Explicitly choose strong, modern cryptographic algorithms and modes when using Hutool's crypto APIs.
      • Consult with security experts to select appropriate cryptographic algorithms and ensure secure implementation when using Hutool's crypto functionalities.
      • Prefer well-established and widely vetted cryptographic algorithms and libraries over less common or custom options, even if offered by Hutool.
      • Regularly review and update cryptographic choices as best practices evolve and new vulnerabilities are discovered.

Threat: hutool-core Module Threats - Deserialization Vulnerabilities

  • Threat: Insecure Deserialization via SerializeUtil or ObjectUtil
    • Description: Hutool's SerializeUtil or ObjectUtil might facilitate or encourage insecure deserialization practices without sufficient warnings or secure defaults. If developers use these utilities to deserialize untrusted data, they could be vulnerable to deserialization attacks, potentially leading to Remote Code Execution (RCE). This threat is related to Hutool's handling of Java serialization and deserialization.
    • Impact: Remote Code Execution (RCE), complete system compromise.
    • Hutool Component Affected: ObjectUtil, SerializeUtil.
    • Risk Severity: Critical.
    • Mitigation Strategies:
      • Avoid deserializing untrusted data using Hutool's SerializeUtil or ObjectUtil if at all possible. Java deserialization is inherently risky and should be avoided when handling external or untrusted data.
      • If deserialization is absolutely necessary, do not use default Java serialization. Explore safer alternatives like JSON or Protocol Buffers for data serialization and deserialization.
      • If Java serialization must be used, implement robust safeguards such as:
        • Restricting deserialization to a very strict allow-list of safe classes.
        • Utilizing modern deserialization libraries that offer built-in protection mechanisms against common deserialization attacks.
      • Ensure your application dependencies are regularly updated to patch any known deserialization vulnerabilities in underlying libraries.