GO-2022-1143

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Source

https://pkg.go.dev/vuln/GO-2022-1143

Import Source

https://vuln.go.dev/ID/GO-2022-1143.json

JSON Data

https://api.osv.dev/v1/vulns/GO-2022-1143

Aliases

Published

2022-12-07T16:08:45Z

Modified

2024-09-11T06:13:31.258567Z

Summary

Restricted file access on Windows in os and net/http

Details

On Windows, restricted files can be accessed via os.DirFS and http.Dir.

The os.DirFS function and http.Dir type provide access to a tree of files rooted at a given directory. These functions permit access to Windows device files under that root. For example, os.DirFS("C:/tmp").Open("COM1") opens the COM1 device. Both os.DirFS and http.Dir only provide read-only filesystem access.

In addition, on Windows, an os.DirFS for the directory (the root of the current drive) can permit a maliciously crafted path to escape from the drive and access any path on the system.

With fix applied, the behavior of os.DirFS("") has changed. Previously, an empty root was treated equivalently to "/", so os.DirFS("").Open("tmp") would open the path "/tmp". This now returns an error.

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

1.18.9

Introduced

1.19.0-0

Fixed

1.19.4

Ecosystem specific

{
    "imports": [
        {
            "path": "os",
            "symbols": [
                "DirFS",
                "dirFS.Open",
                "dirFS.Stat"
            ],
            "goos": [
                "windows"
            ]
        },
        {
            "path": "net/http",
            "symbols": [
                "Dir.Open",
                "ServeFile",
                "fileHandler.ServeHTTP",
                "fileTransport.RoundTrip"
            ],
            "goos": [
                "windows"
            ]
        }
    ]
}