GHSA-rj76-h87p-r3wf Undertow vulnerable to Request Smuggling

• Maven io.undertow:undertow-core: >= 1.4.0, < 1.4.17.Final → fixed in 1.4.17.Final • Maven io.undertow:undertow-core: >= 1.3.0, < 1.3.31.Final → fixed in 1.3.31.Final • Maven io.undertow:undertow-core: >= 2.0.0.Alpha1, < 2.0.0.Alpha2 → fixed in 2.0.0.Alpha2

In Undertow 2.x before 2.0.0.Alpha2, 1.4.x before 1.4.17.Final, and 1.3.x before 1.3.31.Final, it was found that the fix for CVE-2017-2666 was incomplete and invalid characters are still allowed in the query string and path parameters. 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.