improve become/runas error messaging on bogus/missing username (#31551)

This commit is contained in:
Matt Davis 2017-10-10 16:53:21 -07:00 committed by GitHub
parent 751f577de1
commit a4ceb4c35f

View file

@ -957,12 +957,21 @@ Function Run($payload) {
# NB: CreateProcessWithTokenW commandline maxes out at 1024 chars, must bootstrap via filesystem
$temp = [System.IO.Path]::Combine([System.IO.Path]::GetTempPath(), [System.IO.Path]::GetRandomFileName() + ".ps1")
$exec_wrapper.ToString() | Set-Content -Path $temp
# allow (potentially unprivileged) target user access to the tempfile (NB: this likely won't work if traverse checking is enabled)
$acl = Get-Acl $temp
$acl.AddAccessRule($(New-Object System.Security.AccessControl.FileSystemAccessRule($username, "FullControl", "Allow")))
Set-Acl $temp $acl | Out-Null
$rc = 0
Try {
# allow (potentially unprivileged) target user access to the tempfile (NB: this likely won't work if traverse checking is enabled)
$acl = Get-Acl $temp
Try {
$acl.AddAccessRule($(New-Object System.Security.AccessControl.FileSystemAccessRule($username, "FullControl", "Allow")))
}
Catch [System.Security.Principal.IdentityNotMappedException] {
throw "become_user '$username' is not recognized on this host"
}
Set-Acl $temp $acl | Out-Null
$payload_string = $payload | ConvertTo-Json -Depth 99 -Compress
$lp_command_line = New-Object System.Text.StringBuilder @("powershell.exe -NonInteractive -NoProfile -ExecutionPolicy Bypass -File $temp")