Restricted file access on Windows in os and net/http(CVE-2022-41720)

概要

Restricted file access on Windows in os and net/http

原文の説明

取得元が公開している説明をそのまま載せています (多くは英語)。

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.

出典: OSV.dev (Open Source Vulnerabilities) NVD OSV

影響パッケージ

Bitnami golang

[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.18.9"},{"introduced":"1.19.0"},{"fixed":"1.19.4"}]}]

ディストリビューション別の修正状況

各ディストリビューションが公開している、この CVE の修正パッケージ

Debian DEBIAN-CVE-2022-41720 golang-1.15

参照URL

advisory go.dev
advisory go.dev
advisory groups.google.com
advisory pkg.go.dev
web nvd.nist.gov