HTTP Request Smuggling Affecting io.netty:netty-codec-http2 package, versions [,4.1.60.Final)
Threat Intelligence
Exploit Maturity
Mature
EPSS
18.57% (97th
percentile)
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Test your applications- Snyk ID SNYK-JAVA-IONETTY-1083991
- published 10 Mar 2021
- disclosed 10 Mar 2021
- credit Unknown
Introduced: 10 Mar 2021
CVE-2021-21295 Open this link in a new tabHow to fix?
Upgrade io.netty:netty-codec-http2 to version 4.1.60.Final or higher.
Overview
io.netty:netty-codec-http2 is a HTTP2 sub package for the netty library, an event-driven asynchronous network application framework.
Affected versions of this package are vulnerable to HTTP Request Smuggling. If a Content-Length header is present in the original HTTP/2 request, the field is not validated by Http2MultiplexHandler as it is propagated up.
An additional case of this vulnerability was fixed in 4.1.61.Final (CVE-2021-21409).
CVSS Scores
version 3.1