Description
It was found in Undertow before 1.3.28 that with non-clean TCP close, the Websocket server gets into infinite loop on every IO thread, effectively causing DoS.
Remediation
References
http://rhn.redhat.com/errata/RHSA-2017-1409.html
http://www.securityfocus.com/bid/98965
https://access.redhat.com/errata/RHSA-2017:1410
https://access.redhat.com/errata/RHSA-2017:1411
https://access.redhat.com/errata/RHSA-2017:1412
https://access.redhat.com/errata/RHSA-2017:3454
https://access.redhat.com/errata/RHSA-2017:3455
https://access.redhat.com/errata/RHSA-2017:3456
https://access.redhat.com/errata/RHSA-2017:3458
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2670
https://www.debian.org/security/2017/dsa-3906
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