HTTP Response Splitting Affecting io.ratpack:ratpack-core package, versions (0.9.1,1.7.5)
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Test your applications- Snyk ID SNYK-JAVA-IORATPACK-473841
- published 18 Oct 2019
- disclosed 17 Oct 2019
- credit Jonathan Leitschuh
Introduced: 17 Oct 2019
CVE-2019-17513 Open this link in a new tabHow to fix?
Upgrade io.ratpack:ratpack-core
to version 1.7.5 or higher.
Overview
io.ratpack:ratpack-core is a simple, capable, toolkit for creating high performance web applications.
Affected versions of this package are vulnerable to HTTP Response Splitting. If untrusted and unsanitized data is used to populate the headers of an HTTP response, an attacker can utilize this vulnerability to have the server issue any HTTP response they specify. The root cause was due to using the netty
DefaultHttpHeaders object
with verification disabled.
If your application uses arbitrary user input as the value of a response header it is vulnerable. If your application does not use arbitrary values as response header values, it is not vulnerable.
PoC by Jonathan Leitschuh
RatpackServer startedServer = RatpackServer.start(server -> {
server.handlers(chain -> chain.all(ctx -> {
// User supplied query parameter
String header = ctx.getRequest().getQueryParams().get("header");
// User supplied data used to populate a header value.
ctx.header("the-header", header)
.render("OK!");
}));
});