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.
[
{
"product": "undertow",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Undertow 2.2.0.Final, Undertow 2.1.6.Final, Undertow 2.0.34.Final"
}
]
}
]