Unsanitized user input in deserialization method

• Rule ID: ruby_lang_deserialization_of_user_input
• Languages: ruby
• Source: deserialization_of_user_input.yml

Description

Deserializing data from untrusted sources, like parameters or cookies, without proper validation is a security risk. Attackers can embed malicious code or payloads in serialized data. When your application deserializes this data, it can compromise your system's security.

Remediations

• Do not deserialize data from untrusted sources directly. This prevents attackers from exploiting the deserialization process.
• Do use data formats that are purely data-oriented and not tied to a specific programming language, such as JSON or XML, for serialization and deserialization. This approach minimizes the risk of executing malicious code during deserialization.

  user_data = JSON.parse(params[:user])
  JSON.load(user)

References

• OWASP Deserialization cheat sheet

Associated CWE

• CWE-502: Deserialization of Untrusted Data

OWASP Top 10

• A08:2021 - Software and Data Integrity Failures

Configuration

To skip this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --skip-rule=ruby_lang_deserialization_of_user_input

To run only this rule during a scan, use the following flag

bearer scan /path/to/your-project/ --only-rule=ruby_lang_deserialization_of_user_input