Land rapid7#4302, zeroSteiner's fix getuid for the python meterpreter

Author: Brent Cook

data/meterpreter/ext_server_stdapi.py

@@ -675,8 +675,10 @@ def channel_open_stdapi_net_tcp_server(request, response):
 @meterpreter.register_function
 def stdapi_sys_config_getenv(request, response):
 	for env_var in packet_enum_tlvs(request, TLV_TYPE_ENV_VARIABLE):
-		pgroup = ''
-		env_var = env_var['value'].translate(None, '%$')
+		pgroup = bytes()
+		env_var = env_var['value']
+		env_var = env_var.replace('%', '')
+		env_var = env_var.replace('$', '')
 		env_val = os.environ.get(env_var)
 		if env_val:
 			pgroup += tlv_pack(TLV_TYPE_ENV_VARIABLE, env_var)
@@ -698,7 +700,9 @@ def stdapi_sys_config_getsid(request, response):
 
 @meterpreter.register_function
 def stdapi_sys_config_getuid(request, response):
-	if has_windll:
+	if has_pwd:
+		username = pwd.getpwuid(os.getuid()).pw_name
+	elif has_windll:
 		token = get_token_user(ctypes.windll.kernel32.GetCurrentProcess())
 		if not token:
 			return ERROR_FAILURE, response