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I 'm just surprised that online bank thieves took so long in joining spying contractors in abusing the global SS7 network , " Karsten Nohl , a cybersecurity researcher who has highlighted vulnerabilities in SS7 , told Motherboard in an email .
 SS7: vulnerable system; vulnerabilities: vulnerability; Karsten Nohl: discoverer; cybersecurity researcher: discoverer; abusing the global SS7 network: 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:
 SS7: vulnerable system; vulnerabilities: vulnerability; Karsten Nohl: discoverer; cybersecurity researcher: discoverer; abusing the global SS7 network: capabilities