Jetty 8.1.0.RC2 and earlier computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.
marc.info/?l=bugtraq&m=143387688830075&w=2
www.kb.cert.org/vuls/id/903934
www.ocert.org/advisories/ocert-2011-003.html
www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html
www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
www.oracle.com/technetwork/topics/security/cpujan2015-1972971.html
www.ubuntu.com/usn/USN-1429-1
exchange.xforce.ibmcloud.com/vulnerabilities/72017
github.com/eclipse/jetty.project
github.com/eclipse/jetty.project/commit/085c79d7d6cfbccc02821ffdb64968593df3e0bf
nvd.nist.gov/vuln/detail/CVE-2011-4461
security.netapp.com/advisory/ntap-20190307-0004