GHSA-rj76-h87p-r3wf

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GHSA-rj76-h87p-r3wf

Summary: Undertow vulnerable to Request Smuggling

Details: 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.

References: https://nvd.nist.gov/vuln/detail/CVE-2017-7559, https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7559, https://github.com/undertow-io/undertow, https://issues.jboss.org/browse/UNDERTOW-1251