CVE-2021-29479

HTTP Request Smuggling in maven/io.ratpack/ratpack-core

Identifier

CVE-2021-29479

Package Slug

maven/io.ratpack/ratpack-core

Vulnerability

HTTP Request Smuggling

Description

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. F, 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. The vulnerability was patched in Ratpack As a workaround, ensure that ServerConfigBuilder::publicAddress correctly configures the server in production.

Affected Versions

All versions before 1.9.0

Solution

Upgrade to version 1.9.0 or above.

Last Modified

2021-07-12

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