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“ Our experiments reveal several instances of VPN apps that expose users to serious privacy and security vulnerabilities , such as use of insecure VPN tunneling protocols , as well as IPv6 and DNS traffic leakage , ” said researchers Muhammad Ikram , Narseo Vallina - Rodriguez , Suranga Seneviratne , Mohamed Ali Kaafar and Vern Paxson , representing Australia ’s Commonwealth Scientific and Industrial Research Organization ( AU - CSIRO ) , the University of South Wales , and the International Computer Science Institute at the University of California at Berkeley .
 VPN apps: vulnerable system; security vulnerabilities: vulnerability; IPv6 and DNS traffic leakage: capabilities; Vern Paxson: discoverer; Mohamed Ali Kaafar: discoverer; Suranga Seneviratne: discoverer; Narseo Vallina - Rodriguez: discoverer; Muhammad Ikram: discoverer; use of insecure VPN tunneling protocols: capabilities; expose users to serious privacy: capabilities; the University of California at Berkeley: discoverer; the International Computer Science Institute: discoverer; the University of South Wales: discoverer; Australia ’s Commonwealth Scientific and Industrial Research Organization ( AU - CSIRO ): 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:
 VPN apps: vulnerable system; security vulnerabilities: vulnerability; IPv6 and DNS traffic leakage: capabilities; Vern Paxson: discoverer; Mohamed Ali Kaafar: discoverer; Suranga Seneviratne: discoverer; Narseo Vallina - Rodriguez: discoverer; Muhammad Ikram: discoverer; use of insecure VPN tunneling protocols: capabilities; expose users to serious privacy: capabilities; the University of California at Berkeley: discoverer; the International Computer Science Institute: discoverer; the University of South Wales: discoverer; Australia ’s Commonwealth Scientific and Industrial Research Organization ( AU - CSIRO ): discoverer