BIT-zookeeper-2021-21295

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Import Source

https://github.com/bitnami/vulndb/tree/main/data/zookeeper/BIT-zookeeper-2021-21295.json

JSON Data

https://api.osv.dev/v1/vulns/BIT-zookeeper-2021-21295

Aliases

Published

2024-03-06T11:09:05.590Z

Modified

2024-08-01T07:13:04.232041Z

Summary

[none]

Details

Netty is an open-source, asynchronous event-driven network application framework for rapid development of maintainable high performance protocol servers & clients. In Netty (io.netty:netty-codec-http2) before version 4.1.60.Final there is a vulnerability that enables 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. This is fine as long as the request is not proxied through as HTTP/1.1. If the request comes in as an HTTP/2 stream, gets converted into the HTTP/1.1 domain objects (HttpRequest, HttpContent, etc.) via Http2StreamFrameToHttpObjectCodecand then sent up to the child channel's pipeline and proxied through a remote peer as HTTP/1.1 this may result in request smuggling. In a proxy case, users may assume the content-length is validated somehow, which is not the case. If the request is forwarded to a backend channel that is a HTTP/1.1 connection, the Content-Length now has meaning and needs to be checked. An attacker can smuggle requests inside the body as it gets downgraded from HTTP/2 to HTTP/1.1. For an example attack refer to the linked GitHub Advisory. Users are only affected if all of this is true: HTTP2MultiplexCodec or Http2FrameCodec is used, Http2StreamFrameToHttpObjectCodec is used to convert to HTTP/1.1 objects, and these HTTP/1.1 objects are forwarded to another remote peer. This has been patched in 4.1.60.Final As a workaround, the user can do the validation by themselves by implementing a custom ChannelInboundHandler that is put in the ChannelPipeline behind Http2StreamFrameToHttpObjectCodec.

Database specific

{
    "cpes": [
        "cpe:2.3:a:apache:zookeeper:3.5.9:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
}

References

Affected packages

Bitnami / zookeeper

Package

Name: zookeeper
Purl: pkg:bitnami/zookeeper

Severity

5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator

Affected ranges

Type: SEMVER
Events: Introduced

3.5.9

Last affected

3.5.9