GO-2023-2382

Source

https://pkg.go.dev/vuln/GO-2023-2382

Import Source

https://vuln.go.dev/ID/GO-2023-2382.json

Aliases

Published

2023-12-06T16:22:36Z

Modified

2023-12-13T08:12:25.459507Z

Summary

Denial of service via chunk extensions in net/http

Details

A malicious HTTP sender can use chunk extensions to cause a receiver reading from a request or response body to read many more bytes from the network than are in the body.

A malicious HTTP client can further exploit this to cause a server to automatically read a large amount of data (up to about 1GiB) when a handler fails to read the entire body of a request.

Chunk extensions are a little-used HTTP feature which permit including additional metadata in a request or response body sent using the chunked encoding. The net/http chunked encoding reader discards this metadata. A sender can exploit this by inserting a large metadata segment with each byte transferred. The chunk reader now produces an error if the ratio of real body to encoded bytes grows too small.

References

Affected packages

Go / stdlib

Package

Name: stdlib

Affected ranges

Type: SEMVER
Events: Introduced

0The exact introduced commit is unknown

Fixed

1.20.12

Introduced

1.21.0-0

Fixed

1.21.5

Ecosystem specific

{
    "imports": [
        {
            "path": "net/http/internal",
            "symbols": [
                "chunkedReader.Read",
                "chunkedReader.beginChunk",
                "readChunkLine"
            ]
        }
    ]
}