Skip to main content

C# support

tip

Semgrep’s C# coverage leverages framework-specific analysis capabilities that are not present in Semgrep CE. As a result, many framework specific Pro rules will fail to return findings if run on Semgrep CE. To ensure full security coverage, run: semgrep login && semgrep ci.

Semgrep Code analyses​

  • Interfile analysis (cross-file)
  • Interprocedural analysis (cross-function)
  • All analyses performed by Semgrep CE

Coverage​

Semgrep aims to provide comprehensive and accurate detection of common OWASP Top 10 issues in source code. Semgrep uses rules, which are instructions based on which it detects patterns in code. These rules are usually organized in rulesets.

By default, Semgrep Code provides you with the p/comment and p/default rulesets. These rulesets provide the most accurate and comprehensive coverage across Semgrep's supported languages.

Some examples of rules include:

C# support in Semgrep Supply Chain​

Semgrep Supply Chain is a software composition analysis (SCA) tool that detects security vulnerabilities in your codebase introduced by open source dependencies.

Supported package managers​

Semgrep supports the following C# package manager:

  • NuGet

Analyses and features​

The following analyses and features are available for C#:

Reachability analysis

Reachability refers to whether or not a vulnerable code pattern from a dependency is used in the codebase that imports it. In Semgrep Supply Chain, both a dependency's vulnerable version and code pattern must match for a vulnerability to be considered reachable.

License detection

Semgrep Supply Chain's license compliance feature enables you to explicitly allow or disallow (block) a package's use in your repository based on its license. For example, your company policy may disallow the use of packages with the Creative Commons Attribution-NonCommercial (CC-BY-NC) license. Semgrep can help enforce this restriction.

Malicious dependency detection

Semgrep is able to detect malicious dependencies in your projects and in pull requests (PRs) or merge requests (MRs).

SBOM generation

Semgrep enables you to generate a software bill of materials (SBOM) to assess your third-party dependencies and comply with auditing procedures. Semgrep Supply Chain (SSC) can generate an SBOM for each repository you have added to Semgrep AppSec Platform.

No need for lockfiles

C# projects can be scanned without the need for lockfiles. See Scan a project without lockfiles (beta).

C# support in Semgrep CE​

Semgrep CE is a fast, lightweight program analysis tool that can help you detect bugs in your code. It makes use of Semgrep's LGPL 2.1 open source engine.

Analyses​

  • Single-file, cross-function constant propagation
  • Single-function taint analysis
  • Semantic analysis

Coverage​

tip
  • Check the license of a rule to ensure it meets your licensing requirements. See Licensing for more details.

The Semgrep Registry provides the following C# rule sets:

Sample usage:

semgrep scan --config p/csharp

Not finding what you need in this doc? Ask questions in our Community Slack group, or see Support for other ways to get help.