[jboss-jira] [JBoss JIRA] (WFLY-9724) Undertow does not allow UTF-8 characters in URLs

[Ivo Studensky (JIRA)]

     [ https://issues.jboss.org/browse/WFLY-9724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ivo Studensky updated WFLY-9724:
--------------------------------
    Summary: Undertow does not allow UTF-8 characters in URLs  (was: [GSS](7.1.z) Undertow does not allow UTF-8 characters in URLs)


> Undertow does not allow UTF-8 characters in URLs
> ------------------------------------------------
>
>                 Key: WFLY-9724
>                 URL: https://issues.jboss.org/browse/WFLY-9724
>             Project: WildFly
>          Issue Type: Bug
>          Components: Web (Undertow)
>            Reporter: Stuart Douglas
>            Assignee: Stuart Douglas
>              Labels: downstream_dependency, qe-pre-ack
>
> We receive a 400 response code if using UTF-8 characters for a request, due to this check:
> https://github.com/undertow-io/undertow/blob/master/core/src/main/java/io/undertow/server/protocol/http/HttpRequestParser.java#L375
> This was introduced in UNDERTOW-1101. We want to understand why it is necessary for the CVE/CWE regarding request smuggling, but this ticket is to at least make this check optional as it goes against the URL_ENCODING UndertowOption when set to UTF-8 (default).



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