CVE-2022-41720
Assigner: Go
Published: 2022-12-07T16:11:18.867Z
State: PUBLISHED
title: Restricted file access on Windows in os and net/http
descriptions: value: 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.
affected: vendor: Go standard library
product: os
collectionURL: https://pkg.go.dev
packageName: os
versions: version: 0
lessThan: 1.18.9
status: affected
versionType: semver
version: 1.19.0-0
lessThan: 1.19.4
status: affected
versionType: semver
platforms: windows
programRoutines: dirFS.Open
dirFS.Stat
DirFS
defaultStatus: unaffected
vendor: Go standard library
product: net/http
collectionURL: https://pkg.go.dev
packageName: net/http
versions: version: 0
lessThan: 1.18.9
status: affected
versionType: semver
version: 1.19.0-0
lessThan: 1.19.4
status: affected
versionType: semver
platforms: windows
programRoutines: Dir.Open
ServeFile
fileHandler.ServeHTTP
fileTransport.RoundTrip
defaultStatus: unaffected
problemTypes: descriptions: description: CWE 22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')