HTTP Request Header Injection Affecting io.micronaut:micronaut-http-client package, versions [,1.2.11) [1.3.0,1.3.2)


0.0
medium

Snyk CVSS

    Exploit Maturity Proof of concept
    Attack Complexity High
Expand this section
NVD
9.8 critical

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  • Snyk ID SNYK-JAVA-IOMICRONAUT-561342
  • published 26 Mar 2020
  • disclosed 26 Mar 2020
  • credit Jonathan Leitschuh

How to fix?

Upgrade io.micronaut:micronaut-http-client to version 1.2.11, 1.3.2 or higher.

Overview

io.micronaut:micronaut-http-client is a modern, JVM-based, full stack microservices framework designed for building modular, easily testable microservice applications.

Affected versions of this package are vulnerable to HTTP Request Header Injection due to not validating request headers passed to the client.

PoC by Jonathan Leitschuh

@Controller("/hello")
public class HelloController {

    @Inject
    @Client("/")
    RxHttpClient client;

    @Get("/external-exploit")
    @Produces(MediaType.TEXT_PLAIN)
    public String externalExploit(@QueryValue("header-value") String headerValue) {
        return client.toBlocking().retrieve(
            HttpRequest.GET("/hello")
                .header("Test", headerValue)
        );
    }
}