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To recap , Meltdown ( aka F ** CKWIT or CVE -2017-5754 ) is a proof - of - concept hardware vulnerability uncovered almost simultaneously by several groups of researchers through which an attacker could access the contents of kernel memory ( passwords , encryption keys , say ) from the part used by ordinary applications .
 several groups of researchers: discoverer; an attacker could access the contents of kernel memory: capabilities; Meltdown: vulnerability; CVE -2017-5754: common vulnerabilities and exposures; a proof - of - concept hardware vulnerability: vulnerability
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:
 several groups of researchers: discoverer; an attacker could access the contents of kernel memory: capabilities; Meltdown: vulnerability; CVE -2017-5754: common vulnerabilities and exposures; a proof - of - concept hardware vulnerability: vulnerability