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The hacker confirmed that the 0 - day is offered for sale on Tor by a hacker that goes by the moniker “ lo4fer ” .
 the 0 - day: vulnerability; The hacker: discoverer; offered for sale: capabilities
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:
 the 0 - day: vulnerability; The hacker: discoverer; offered for sale: capabilities