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GHSA-qjwc-v72v-fq6r

HTTP request smuggling in Undertow

Source: GitHub Advisory Database (reviewed) Moderate CVE-2021-20220

Packages

EcosystemPackageAffectedFixed in
Maven io.undertow:undertow-core >= 2.1.0, < 2.1.6 2.1.6
Maven io.undertow:undertow-core < 2.0.34 2.0.34

Details

As written in the advisory (Markdown source, shown as plain text).

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.

References

External links from the advisory. They lead to third-party sites.