Description
Chaskiq through 2.0.3 contains a server-side request forgery vulnerability that allows unauthenticated attackers to make the server fetch arbitrary URLs via the url parameter of the /oembed endpoint. Attackers can target loopback, private, or cloud-metadata addresses through FetchLinkCardService, which follows redirects and skips TLS verification, to read internal page titles and descriptions.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| chaskiq | chaskiq | ≤ 2.0.3 | — |
References
- https://hackmd.io/@hieuPenguinnn/chaskiq-unauthenticated-ssrf-oembed-url-upload third-party-advisory
- https://github.com/chaskiq/chaskiq/blob/2.0.3/app/controllers/oembed_controller.rb#L8-L11 technical-description
- https://github.com/chaskiq/chaskiq/blob/2.0.3/app/services/fetch_link_card_service.rb#L11-L40 technical-description
- VulnCheck Advisory: Chaskiq through 2.0.3 Unauthenticated SSRF via /oembed Endpoint third-party-advisory