GHSA-fwcm-636p-68r5

Server-side request forgery in CarrierWave

Source: GitHub Advisory Database (reviewed) Moderate CVE-2021-21288

Packages

Ecosystem	Package	Affected	Fixed in
RubyGems	carrierwave	< 1.3.2	1.3.2
RubyGems	carrierwave	>= 2.0.0, < 2.1.1	2.1.1

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact [CarrierWave download feature](https://github.com/carrierwaveuploader/carrierwave#uploading-files-from-a-remote-location) has an SSRF vulnerability, allowing attacks to provide DNS entries or IP addresses that are intended for internal use and gather information about the Intranet infrastructure of the platform. ### Patches Upgrade to [2.1.1](https://rubygems.org/gems/carrierwave/versions/2.1.1) or [1.3.2](https://rubygems.org/gems/carrierwave/versions/1.3.2). ### Workarounds Using proper network segmentation and applying the principle of least privilege to outbound connections from application servers can reduce the severity of SSRF vulnerabilities. Ideally the vulnerable gem should run on an isolated server without access to any internal network resources or cloud metadata access. ### References [Server-Side Request Forgery Prevention Cheat Sheet](https://cheatsheetseries.owasp.org/cheatsheets/Server_Side_Request_Forgery_Prevention_Cheat_Sheet.html) ### For more information If you have any questions or comments about this advisory: * Open an issue in [CarrierWave repo](https://github.com/carrierwaveuploader/carrierwave) * Email me at [[email protected]](mailto:[email protected])

References

External links from the advisory. They lead to third-party sites.