improve become/runas error messaging on bogus/missing username (#31551)
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1 changed files with 13 additions and 4 deletions
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@ -957,12 +957,21 @@ Function Run($payload) {
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# NB: CreateProcessWithTokenW commandline maxes out at 1024 chars, must bootstrap via filesystem
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$temp = [System.IO.Path]::Combine([System.IO.Path]::GetTempPath(), [System.IO.Path]::GetRandomFileName() + ".ps1")
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$exec_wrapper.ToString() | Set-Content -Path $temp
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# allow (potentially unprivileged) target user access to the tempfile (NB: this likely won't work if traverse checking is enabled)
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$acl = Get-Acl $temp
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$acl.AddAccessRule($(New-Object System.Security.AccessControl.FileSystemAccessRule($username, "FullControl", "Allow")))
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Set-Acl $temp $acl | Out-Null
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$rc = 0
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Try {
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# allow (potentially unprivileged) target user access to the tempfile (NB: this likely won't work if traverse checking is enabled)
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$acl = Get-Acl $temp
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Try {
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$acl.AddAccessRule($(New-Object System.Security.AccessControl.FileSystemAccessRule($username, "FullControl", "Allow")))
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}
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Catch [System.Security.Principal.IdentityNotMappedException] {
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throw "become_user '$username' is not recognized on this host"
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}
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Set-Acl $temp $acl | Out-Null
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$payload_string = $payload | ConvertTo-Json -Depth 99 -Compress
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$lp_command_line = New-Object System.Text.StringBuilder @("powershell.exe -NonInteractive -NoProfile -ExecutionPolicy Bypass -File $temp")
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