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Security researchers discovered a security vulnerability in Android 's app permission model that could allow malicious apps to download onto the mobile device directly from Google Play and launch ransomware , adware , and banking malware , according to a Check Point Software blog post today .
 a security vulnerability: vulnerability; Security researchers: discoverer; app: vulnerable system; allow malicious apps to download: capabilities; Android: vulnerable system
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 security vulnerability: vulnerability; Security researchers: discoverer; app: vulnerable system; allow malicious apps to download: capabilities; Android: vulnerable system