CVE-2017-7559

Name	CVE-2017-7559
Description	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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs	885576

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
undertow (PTS)	sid	2.2.21-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
undertow	source	(unstable)	1.4.23-1			885576

Notes

CVE is for an incomplete fix of CVE-2017-2666
Invalid characters were still allowed in the query string and path parameters.
https://issues.jboss.org/browse/UNDERTOW-1165
https://issues.jboss.org/browse/UNDERTOW-1295
https://bugzilla.redhat.com/show_bug.cgi?id=1481665#c7
Fixed by https://github.com/undertow-io/undertow/commit/3436b03eda8b0b62c1855698c4d7c358add836c2