CVE-2017-2666

It was discovered in Undertow that the code that parsed the HTTP request
line permitted invalid characters. This could be exploited, in conjunction
with a proxy that also permitted the invalid characters but with a
different interpretation, to inject data into the HTTP response. By
manipulating the HTTP response the attacker could poison a web-cache,
perform an XSS attack, or obtain sensitive information from requests other
than their own.

Bugs

• <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=864405&gt;
• <https://bugzilla.redhat.com/show_bug.cgi?id=1436163&gt;