QID 981301

QID 981301: Java (maven) Security Update for io.ratpack:ratpack-core (GHSA-w6rq-6h34-vh7q)

A user supplied `X-Forwarded-Host` header can be used to perform cache poisoning of a cache fronting a Ratpack server if the cache key does not include the `X-Forwarded-Host` header as a cache key.

Users are only vulnerable if they do not configure a custom `PublicAddress` instance. A custom `PublicAddress` can be specified by using [ServerConfigBuilder::publicAddress](https://ratpack.io/manual/current/api/ratpack/server/ServerConfigBuilder.html#publicAddress-java.net.URI-). For versions prior to 1.9.0, by default, Ratpack utilizes an inferring version of `PublicAddress` which is vulnerable.

This can be used to perform redirect cache poisoning where an attacker can force a cached redirect to redirect to their site instead of the intended redirect location.

CVSS V3 rated as High - 6.1 severity.

CVSS V2 rated as Medium - 4 severity.

Solution

As of Ratpack 1.9.0, two changes have been made that mitigate this vulnerability:

1. The default PublicAddress implementation no longer infers the address from the request context, instead relying on the configured bind host/port
2. Relative redirects issued by the application are no longer absolutized; they are passed through as-isWorkaround:
In production, ensure that [ServerConfigBuilder::publicAddress](https://ratpack.io/manual/current/api/ratpack/server/ServerConfigBuilder.html#publicAddress-java.net.URI-) correctly configures the server.

Vendor References

GHSA-w6rq-6h34-vh7q - github.com/advisories/GHSA-w6rq-6h34-vh7q

CVEs related to QID 981301

CVE-2021-29479 |

Software Advisories

Advisory ID	Software	Component	Link
GHSA-w6rq-6h34-vh7q	io.ratpack:ratpack-core		github.com/advisories/GHSA-w6rq-6h34-vh7q

By selecting these links, you may be leaving CVEreport webspace. We have provided these links to other websites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other websites that are more appropriate for your purpose. CVEreport does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, CVEreport does not endorse any commercial products that may be mentioned on these sites. Please address comments about any linked pages to [email protected].