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[email protected]CVE-2022-41720

HistoryDec 07, 2022 - 5:15 p.m.

CVE-2022-41720

2022-12-0717:15:10

CWE-22

[email protected]

web.nvd.nist.gov

152

cve-2022-41720

windows

os.dirfs

http.dir

windows device files

restricted files

file access

security vulnerability

7.5 High

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

7.3 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

53.4%

JSON

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 configurations

NVD

Node

microsoftwindowsMatch-

AND

golanggoRange<1.18.9

golanggoRange1.19.0–1.19.4

CPENameOperatorVersion
golang:gogolang golt1.18.9
golang:gogolang golt1.19.4

CPE	Name	Operator	Version
golang:go	golang go	lt	1.18.9
golang:go	golang go	lt	1.19.4

CNA 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": [
      {
        "name": "dirFS.Open"
      },
      {
        "name": "dirFS.Stat"
      },
      {
        "name": "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": [
      {
        "name": "Dir.Open"
      },
      {
        "name": "ServeFile"
      },
      {
        "name": "fileHandler.ServeHTTP"
      },
      {
        "name": "fileTransport.RoundTrip"
      }
    ],
    "defaultStatus": "unaffected"
  }
]