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As part of Unit 42 ’s ongoing threat research , we can now disclose that Palo Alto Networks Unit 42 researchers have discovered two code execution vulnerabilities affecting Microsoft Office that were addressed in Microsoft ’s May 2017 monthly security update release : For current customers with a Threat Prevention subscription , Palo Alto Networks has also released IPS signatures providing proactive protection from these vulnerabilities .
 we: discoverer; Unit 42: 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:
 we: discoverer; Unit 42: discoverer