Agent can throw exception if it tries to read malformed nmap xml file #169
Description
[+] Thread-1: Fetching Target from https://natlas.io
[+] Thread-1: [Server] Target: 191.222.148.70
[+] Thread-1: Scan fdrvra799fodfg4e Complete
Exception in thread Thread-1:
Traceback (most recent call last):
File "/opt/natlas/natlas-agent/venv/lib/python3.6/site-packages/libnmap/parser.py", line 90, in _parse_xml
root = ET.fromstring(nmap_data)
File "/usr/lib/python3.6/xml/etree/ElementTree.py", line 1315, in XML
return parser.close()
File "<string>", line None
xml.etree.ElementTree.ParseError: no element found: line 7, column 0
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner
self.run()
File "./natlas-agent.py", line 367, in run
result = scan(target_data)
File "./natlas-agent.py", line 267, in scan
nmap_report = NmapParser.parse(result['xml_data'])
File "/opt/natlas/natlas-agent/venv/lib/python3.6/site-packages/libnmap/parser.py", line 41, in parse
nmapobj = cls._parse_xml(nmap_data, incomplete)
File "/opt/natlas/natlas-agent/venv/lib/python3.6/site-packages/libnmap/parser.py", line 92, in _parse_xml
raise NmapParserException("Wrong XML structure: cannot parse data")
libnmap.parser.NmapParserException: Wrong XML structure: cannot parse data
Relevant xml file is posted here: https://pastebin.com/raw/0mAWysk3
I'm not 100% sure what caused this XML data to be malformed/unfinished, but the corresponding nmap and gnmap files are empty so I suspect that the nmap process got killed or something similar. We need to be able to handle NmapParserExceptions and probably just throw away the data.