modules:
  - module: std
    versions:
      - fixed: 1.18.8
      - introduced: 1.19.0
        fixed: 1.19.3
    vulnerable_at: 1.19.2
    packages:
      - package: syscall
        goos:
          - windows
        symbols:
          - StartProcess
      - package: os/exec
        goos:
          - windows
        symbols:
          - Cmd.environ
          - dedupEnv
          - dedupEnvCase
        derived_symbols:
          - Cmd.CombinedOutput
          - Cmd.Environ
          - Cmd.Output
          - Cmd.Run
          - Cmd.Start
description: |
    Due to unsanitized NUL values, attackers may be able to maliciously set
    environment variables on Windows.

    In syscall.StartProcess and os/exec.Cmd, invalid environment variable
    values containing NUL values are not properly checked for. A malicious
    environment variable value can exploit this behavior to set a
    value for a different environment variable. For example, the environment
    variable string "A=B\x00C=D" sets the variables "A=B" and "C=D".
credit: RyotaK (https://twitter.com/ryotkak)
references:
  - report: https://go.dev/issue/56284
  - fix: https://go.dev/cl/446916
  - web: https://groups.google.com/g/golang-announce/c/mbHY1UY3BaM/m/hSpmRzk-AgAJ
cve_metadata:
    id: CVE-2022-41716
    cwe: 'CWE-158: Improper Neutralization of Null Byte or NUL Character'