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The researcher who found the flaw , Michał Bentkowski from Polish security firm Securitum , gave a brief description of the root cause in a tweet shortly after Cisco disclosed the bug .
 The researcher: discoverer; the flaw: vulnerability; Michał Bentkowski: discoverer; Polish security firm Securitum: discoverer
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 researcher: discoverer; the flaw: vulnerability; Michał Bentkowski: discoverer; Polish security firm Securitum: discoverer