CVE-2020-27782

Name	CVE-2020-27782
Description	A flaw was found in the Undertow AJP connector. Malicious requests and abrupt connection closes could be triggered by an attacker using query strings with non-RFC compliant characters resulting in a denial of service. The highest threat from this vulnerability is to system availability. This affects Undertow 2.1.5.SP1, 2.0.33.SP2, and 2.2.3.SP1.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
undertow (PTS)	sid, trixie	2.3.8-2	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)	2.2.4-1

Notes

https://bugzilla.redhat.com/show_bug.cgi?id=1901304
https://issues.redhat.com/browse/UNDERTOW-1824
https://github.com/undertow-io/undertow/commit/fdac349cbcd1da41fe8b9d4e7ebbab6879990c2a (2.2.4.Final)