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Among the 19 security advisories released on Wednesday is a critical bug impacting Junos OS , the FreeBSD - based operating system used in Juniper ’s routers .
 a critical bug: vulnerability; Junos OS: vulnerable system; the FreeBSD - based operating system: vulnerable system; routers: vulnerable system; Juniper: vulnerable system owner
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:
 a critical bug: vulnerability; Junos OS: vulnerable system; the FreeBSD - based operating system: vulnerable system; routers: vulnerable system; Juniper: vulnerable system owner