HTTP Request Smuggling Affecting io.netty:netty-codec-http2 package, versions [,4.1.60.Final)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team

    Threat Intelligence

    Exploit Maturity
    Mature
    EPSS
    18.57% (97th percentile)

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  • Snyk ID SNYK-JAVA-IONETTY-1083991
  • published 10 Mar 2021
  • disclosed 10 Mar 2021
  • credit Unknown

How 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
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Snyk

Recommended
5.9 medium
  • Attack Vector (AV)
    Network
  • Attack Complexity (AC)
    High
  • Privileges Required (PR)
    None
  • User Interaction (UI)
    None
  • Scope (S)
    Unchanged
  • Confidentiality (C)
    None
  • Integrity (I)
    High
  • Availability (A)
    None
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NVD

5.9 medium
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Red Hat

5.9 medium