Add C# BinaryFormatter and Ruby force_ssl security rules with tests #148
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WalkthroughThis pull request introduces new security rules and corresponding tests for both C# and Ruby applications. A C# rule warns against using the insecure Changes
Sequence Diagram(s)sequenceDiagram
participant Dev as Developer
participant Analyzer as Static Analyzer
participant Rule as BinaryFormatter Rule
participant Matcher as Pattern Matcher
Dev->>Analyzer: Commit code with new BinaryFormatter()
Analyzer->>Rule: Execute BinaryFormatter rule check
Rule->>Matcher: Scan for "new BinaryFormatter()"
Matcher-->>Rule: Pattern detected
Rule->>Analyzer: Emit warning (insecure-binaryformatter-deserialization-csharp)
sequenceDiagram
participant Dev as Developer
participant Analyzer as Static Analyzer
participant Rule as Force-SSL Rule
participant AST as AST Grepper
Dev->>Analyzer: Commit code with config.force_ssl = false
Analyzer->>Rule: Run force_ssl rule check
Rule->>AST: Parse AST for "config.force_ssl = false"
AST-->>Rule: Match found
Rule->>Analyzer: Issue warning (force-ssl-false-ruby)
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Actionable comments posted: 2
🧹 Nitpick comments (4)
tests/__snapshots__/force-ssl-false-ruby-snapshot.yml (1)
1-20: Snapshot Definition is ComprehensiveThe snapshot entry for
force-ssl-false-rubycaptures the insecure configuration snippet precisely. The associated labels with source references and line numbers provide valuable context needed for validating the rule's behavior.Suggestion: Consider adding inline comments or a short description next to each label to clarify what each range represents, which can improve future maintainability.
rules/ruby/security/force-ssl-false-ruby.yml (1)
13-24: AST Grep Utility Section: Consider Quoting Complex KeysThe
utilssection correctly defines an AST grep pattern for detecting assignments toconfig.force_sslwith a false value. However, the keyconfig.force_ssl = $FAL:contains special characters (spaces,=, and$) which can sometimes lead to YAML parsing ambiguities.Recommendation: Quote the key for clarity. For example:
- config.force_ssl = $FAL: + "config.force_ssl = $FAL":This will ensure the YAML parser treats it as a literal string.
tests/csharp/insecure-binaryformatter-deserialization-csharp-test.yml (1)
5-7: Remove Trailing Whitespace in Code Snippet
Line 5 shows a trailing space after theusingdirective. Removing extra spaces will help keep the YAML file clean and compliant with YAML lint guidelines.Suggested diff:
- using System.Runtime.Serialization.Formatters.Binary; + using System.Runtime.Serialization.Formatters.Binary;🧰 Tools
🪛 YAMLlint (1.35.1)
[error] 5-5: trailing spaces
(trailing-spaces)
rules/csharp/security/insecure-binaryformatter-deserialization-csharp.yml (1)
42-44: Clean Up the Rule Declaration Section
In theruleblock, specifically on line 44, there are trailing spaces that need to be removed. This will ensure that the YAML remains clean and compliant.@@ - matches: MATCH_PATTERN_BinaryFormatter - + matches: MATCH_PATTERN_BinaryFormatter🧰 Tools
🪛 YAMLlint (1.35.1)
[error] 44-44: trailing spaces
(trailing-spaces)
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📒 Files selected for processing (5)
rules/csharp/security/insecure-binaryformatter-deserialization-csharp.yml(1 hunks)rules/ruby/security/force-ssl-false-ruby.yml(1 hunks)tests/__snapshots__/force-ssl-false-ruby-snapshot.yml(1 hunks)tests/csharp/insecure-binaryformatter-deserialization-csharp-test.yml(1 hunks)tests/ruby/force-ssl-false-ruby-test.yml(1 hunks)
🧰 Additional context used
🪛 YAMLlint (1.35.1)
tests/csharp/insecure-binaryformatter-deserialization-csharp-test.yml
[error] 5-5: trailing spaces
(trailing-spaces)
rules/csharp/security/insecure-binaryformatter-deserialization-csharp.yml
[warning] 18-18: wrong indentation: expected 4 but found 3
(indentation)
[warning] 20-20: wrong indentation: expected 5 but found 4
(indentation)
[error] 25-25: trailing spaces
(trailing-spaces)
[warning] 34-34: wrong indentation: expected 5 but found 4
(indentation)
[error] 41-41: trailing spaces
(trailing-spaces)
[error] 44-44: trailing spaces
(trailing-spaces)
🔇 Additional comments (11)
tests/ruby/force-ssl-false-ruby-test.yml (2)
1-7: Valid Test Case Block Looks GoodThe valid configuration section correctly demonstrates a secure setup by assigning
config.force_ssl = truein thebad_sslmethod. This clear separation in the test helps ensure that secure configurations pass the new rule.
8-11: Invalid Test Case Accurately Captures the Security IssueThe invalid configuration block, where
config.force_sslis set tofalse, is well-structured. It will trigger the new security rule, making it an effective test for identifying insecure setups.rules/ruby/security/force-ssl-false-ruby.yml (2)
1-12: Rule Metadata and Documentation are ClearThe header with
id,language,severity,message, andnoteis well-documented. The message clearly explains the security risk and remediation, and the reference to CWE-311 reinforces the rationale.
25-29: Rule Matching Block is Well-DefinedThe
ruleblock properly outlines the detection logic by specifying an assignment that matchesconfig.force_ssl = $FAL. This clear pattern-matching helps enforce the intended security rule.tests/csharp/insecure-binaryformatter-deserialization-csharp-test.yml (4)
1-4: Clarify Test Fixture Metadata and Structure
The header section (lines 1–4) clearly defines the test ID and sets up an insecure deserialization example under theinvalidkey. This is appropriate for a test case targeting rule detection.
8-9: Verify Namespace and Class Formatting
The declaration of the namespace and the class (lines 6–9) is clear. Ensure that the inner indentation within the code snippet remains consistent with your project's C# formatting guidelines.
10-18: Review Insecure Deserialization Sample
The methodBinaryFormatterDeserialization(lines 10–18) intentionally demonstrates insecure deserialization usingBinaryFormatter. Although modern C# practices recommend using ausingblock for resource management, keep in mind that this code is provided as a negative example to trigger your security rule.
20-24: Assess Exception Handling Approach
The try-catch block (lines 20–24) is straightforward. If this sample is solely for testing the detection of insecure deserialization, then catching a genericExceptionand logging it viaConsole.WriteLineis acceptable.rules/csharp/security/insecure-binaryformatter-deserialization-csharp.yml (3)
1-9: Validate Rule Metadata and Message
The header (lines 1–9) correctly identifies the rule with an ID, severity level, language, and a detailed message explaining why usingBinaryFormatteris dangerous. The information is clear and aligns with CWE-502.
9-12: Ensure Consistency in the Note Section
The note block (lines 9–12) includes a reference to CWE-502 and a documentation link. Verify that the formatting renders correctly in all documentation tools.
26-32: Review the Second List Item in the Utils Block
The second list item (lines 26–32) defining the pattern in a global statement appears correct. Verify that its indentation aligns with the revised structure from the previous diff.
rules/csharp/security/insecure-binaryformatter-deserialization-csharp.yml
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rules/csharp/security/insecure-binaryformatter-deserialization-csharp.yml
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…148) * removed missing-secure-java * httponly-false-csharp * use-of-md5-digest-utils-java * removing use-of-md5-digest-utils and httponly-false-csharp * force-ssl-false-ruby * insecure-binaryformatter-deserialization-csharp --------- Co-authored-by: Sakshis <sakshil@abc.com>
Summary by CodeRabbit
New Features
Tests