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EUVD-2026-22149

fkie_cve-2021-21288

CarrierWave is an open-source RubyGem which provides a simple and flexible way to upload files from Ruby applications. In CarrierWave before versions 1.3.2 and 2.1.1 the download feature 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. This is fixed in versions 1.3.2 and 2.1.1.

GHSA-fwcm-636p-68r5 — Server-side request forgery in CarrierWave

Affected: RubyGems: carrierwave

### 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 [mit.shibuya@gmail.com](mailto:mit.shibuya@gmail.com)

gsd-2021-21288

Withdrawn: UBUNTU-CVE-2021-21288

Withdrawn by the publisher.

Affected: Ubuntu:Pro:16.04:LTS: ruby-carrierwave, Ubuntu:Pro:18.04:LTS: ruby-carrierwave, Ubuntu:20.04:LTS: ruby-carrierwave