Sass Lint File Disclosure Scanner

Sass Lint is a tool widely used by developers and organizations to enforce consistent coding styles in Sass, a CSS preprocessor. It is often integrated into development environments and CI/CD pipelines to automate the linting process, ensuring code quality and maintainability. Companies and individual developers use Sass Lint to detect errors and enforce coding standards before code reaches production, enhancing the quality of the end product. However, wrongly handling configuration files can lead to unintended exposure of settings and rules, which might include sensitive information. This makes it crucial for organizations to manage Sass Lint configurations securely, preventing the accidental disclosure of configuration details in public repositories or production environments.

The vulnerability detected by this scanner involves the misconfiguration leading to file disclosure risks through exposed Sass Lint configuration files. These files can inadvertently reveal sensitive details within a project's directory structure, affecting both developers and the infrastructure. When accessed improperly, it could provide malicious actors with insights into the system, allowing them to attempt further exploits. This type of exposure is especially critical in environments where CI/CD pipelines or automated scripts rely on Sass Lint for pre-deployment checks. Therefore, maintaining secure access controls around configuration files and ensuring they are not publicly accessible is paramount. Detecting such exposures can safeguard an organization from potential attacks that leverage these configuration files.

Technical details of this vulnerability indicate that the endpoint "{{BaseURL}}/.sass-lint.yml" is susceptible to unauthorized access if not correctly secured. The vulnerable parameters include parts of the configuration that define how the linter operates, such as 'options:', 'formatter:', and 'files:'. These parameters, when exposed, can give insights into the configuration and behavior of the Sass Lint tool within the environment. An HTTP 200 status code, coupled with specific keyword matches in the response body, confirms the exposure and potential risk. Ensuring that access to this endpoint is tightly controlled prevents unauthorized access to critical configuration details.

If successfully exploited, the file disclosure vulnerability could allow attackers to review and understand the configuration setup of Sass Lint within a project's environment. This might lead to techniques related to further exploits or perform unauthorized modifications within projects. Malicious individuals could utilize exposed information to craft specific attacks on the infrastructure, leading to data breaches or system compromise. Moreover, such exposure could raise compliance issues if sensitive information or intellectual property is unintentionally revealed. It's crucial to mitigate these potential effects by implementing strict security measures and regular audits.

REFERENCES

• https://github.com/sasstools/sass-lint/blob/develop/docs/sass-lint.yml