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Google Project Zero researcher Thomas Dullien , aka Halvar Flake , discovered that attackers can trigger a memory - corruption issue in the engine if they can get Windows Defender and other affected security products to scan a specially - crafted file .
 aka Halvar Flake: discoverer; Google Project Zero researcher Thomas Dullien: discoverer; a memory - corruption issue: vulnerability; Windows Defender: vulnerable system
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: discover vulnerability 
  Option: vulnerable system owner, vulnerability, capabilities, time, vulnerable system version, discoverer, common vulnerabilities and exposures, supported platform, vulnerable system 
Text: {0} 
Answer:
 aka Halvar Flake: discoverer; Google Project Zero researcher Thomas Dullien: discoverer; a memory - corruption issue: vulnerability; Windows Defender: vulnerable system