GO-2023-2102

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Source

https://pkg.go.dev/vuln/GO-2023-2102

Import Source

https://vuln.go.dev/ID/GO-2023-2102.json

JSON Data

https://api.osv.dev/v1/vulns/GO-2023-2102

Aliases

Related

Published

2023-10-11T16:49:53Z

Modified

2024-10-22T05:28:51.237028Z

Summary

HTTP/2 rapid reset can cause excessive work in net/http

Details

A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing.

With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection.

This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2.

The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.

References

Affected packages

Go / stdlib

Package

Name: stdlib; View open source insights on deps.dev
Purl: pkg:golang/stdlib

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

1.20.10

Introduced

1.21.0-0

Fixed

1.21.3

Ecosystem specific

{
    "imports": [
        {
            "path": "net/http",
            "symbols": [
                "ListenAndServe",
                "ListenAndServeTLS",
                "Serve",
                "ServeTLS",
                "Server.ListenAndServe",
                "Server.ListenAndServeTLS",
                "Server.Serve",
                "Server.ServeTLS",
                "http2Server.ServeConn",
                "http2serverConn.processHeaders",
                "http2serverConn.runHandler",
                "http2serverConn.serve",
                "http2serverConn.upgradeRequest"
            ]
        }
    ]
}

Go / golang.org/x/net

Package

Name: golang.org/x/net; View open source insights on deps.dev
Purl: pkg:golang/golang.org/x/net

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.17.0

Ecosystem specific

{
    "imports": [
        {
            "path": "golang.org/x/net/http2",
            "symbols": [
                "Server.ServeConn",
                "serverConn.processHeaders",
                "serverConn.runHandler",
                "serverConn.serve",
                "serverConn.upgradeRequest"
            ]
        }
    ]
}