Add Ruby security rules for insecure MongoDB client connections

[ESS-ENN]

Summary by CodeRabbit

• New Features

  • Introduced security enhancements that detect insecure MongoDB connection configurations in Ruby applications, flagging empty or hardcoded passwords to help mitigate unauthorized access risks.

• Tests

  • Added new test scenarios and validation snapshots to ensure that the security checks reliably identify both compliant and non-compliant credential management practices.

[CLAassistant]

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1 out of 2 committers have signed the CLA.

✅ ESS-ENN
❌ Sakshis

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[coderabbitai]

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Review failed

The pull request is closed.

Walkthrough

This pull request introduces new security rules in Ruby to detect insecure MongoDB client connections. It adds a rule to flag empty passwords and another to identify hardcoded secrets in MongoDB connection setups. The changes include detailed matching patterns, utility definitions, and references to CWE and OWASP guidelines. Complementing these rules are new snapshot and test configurations designed to validate both proper and improper usage of credentials, ensuring that insecure configurations are flagged during testing.

Changes

File(s)	Change Summary
rules/ruby/security/ruby-mongo-empty-password-ruby.yml rules/ruby/security/ruby-mongo-hardcoded-secret-ruby.yml	Added new security rules to detect MongoDB connections with empty passwords and hardcoded secrets, including pattern matching and utility definitions with CWE/OWASP references.
tests/__snapshots__/ruby-mongo-empty-password-ruby-snapshot.yml tests/__snapshots__/ruby-mongo-hardcoded-secret-ruby-snapshot.yml	Introduced snapshot configurations for verifying MongoDB connection examples with empty passwords and hardcoded secrets, with detailed source labeling.
tests/ruby/ruby-mongo-empty-password-ruby-test.yml tests/ruby/ruby-mongo-hardcoded-secret-ruby-test.yml	Added YAML test cases with both valid and invalid MongoDB connection examples to validate the new security rules.

Sequence Diagram(s)

sequenceDiagram
    participant Developer
    participant SecurityEngine
    participant TestRunner

    Developer->>SecurityEngine: Submit MongoDB connection code
    SecurityEngine->>SecurityEngine: Evaluate rules for empty password & hardcoded secret
    SecurityEngine-->>Developer: Emit warning if a vulnerability is detected
    TestRunner->>SecurityEngine: Run snapshot and YAML-based tests
    SecurityEngine-->>TestRunner: Return validation results

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Possibly related PRs

• Add security rules for detecting hardcoded tokens and empty passwords #143: Adds rules for detecting empty passwords in Python applications, aligning with the Ruby security checks introduced here.
• Add security rules for detecting password vulnerabilities in Python #146: Introduces a rule for detecting empty passwords in pymongo connections in Python, echoing the design principles of the Ruby rule.
• Add security rules for detecting empty passwords and hard-coded secrets in psycopg2 connections #138: Implements rules for detecting empty passwords and hardcoded secrets in psycopg2 connections, reflecting a parallel focus on database connection security.

Suggested reviewers

• ganeshpatro321

Poem

I'm a happy rabbit in the code-filled glen,
Hopping through Mongo rules again and again.
Empty passwords and secrets laid bare,
My keen eyes now catch them with care.
In this secure garden, bugs bid farewell—
A hop, a skip, and all is well!
🐰✨

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📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL
Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 08c29a2 and 1da5d45.

📒 Files selected for processing (6)

• rules/ruby/security/ruby-mongo-empty-password-ruby.yml (1 hunks)
• rules/ruby/security/ruby-mongo-hardcoded-secret-ruby.yml (1 hunks)
• tests/__snapshots__/ruby-mongo-empty-password-ruby-snapshot.yml (1 hunks)
• tests/__snapshots__/ruby-mongo-hardcoded-secret-ruby-snapshot.yml (1 hunks)
• tests/ruby/ruby-mongo-empty-password-ruby-test.yml (1 hunks)
• tests/ruby/ruby-mongo-hardcoded-secret-ruby-test.yml (1 hunks)

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