CVE-2020-10687: Inconsistent Interpretation of HTTP Requests (HTTP Request Smuggling)

September 23, 2020 (updated January 30, 2021)

A flaw was discovered in all versions of Undertow before Undertow Final, where 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.

References

bugzilla.redhat.com/show_bug.cgi?id=1785049
nvd.nist.gov/vuln/detail/CVE-2020-10687

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