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CVE-2020-27782

Published: 23 February 2021

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.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
undertow
Launchpad, Ubuntu, Debian
upstream Needs triage

bionic Needs triage

focal Needs triage

groovy Ignored
(end of life)
hirsute Ignored
(end of life)
trusty Does not exist

xenial Needs triage

impish Ignored
(end of life)
jammy Needs triage

lunar Does not exist

kinetic Ignored
(end of life, was needs-triage)
mantic Does not exist

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H