590
The bug , which was first spotted by researchers at Check Point , is caused by a development oversight in Android permissions , which in the past required users to manually grant downloaded applications the ability to display content on top of other app panes .
 ( discover vulnerability: spotted,  researchers: discoverer, Check Point: discoverer, The bug: vulnerability, manually grant downloaded applications the ability: capabilities) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( discover vulnerability: spotted,  researchers: discoverer, Check Point: discoverer, The bug: vulnerability, manually grant downloaded applications the ability: capabilities) 