description: A flaw was found in Undertow. A regression in the fix for CVE-2020-10687 was found. HTTP request smuggling related to CVE-2017-2666 is possible against HTTP/1.x and HTTP/2 due to permitting invalid characters in an HTTP request. This flaw allows an attacker to poison a web-cache, perform an XSS attack, or obtain sensitive information from request other than their own. The highest threat from this vulnerability is to data confidentiality and integrity.
problem types: CWE-444
affected:
{
product: undertow
vendor: n/a
versions:
status: affected, version: Undertow 2.2.0.Final, Undertow 2.1.6.Final, Undertow 2.0.34.Final
}