1064
To understand why it is so difficult to defend computers from even moderately capable hackers , consider the case of the security flaw officially known as CVE -2017-0199 .
 ( discover vulnerability: officially known as,  the security flaw: vulnerability, CVE -2017-0199: common vulnerabilities and exposures) 
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: officially known as,  the security flaw: vulnerability, CVE -2017-0199: common vulnerabilities and exposures) 