Provide references for CVE-2017-2491.
Where can I find more information about CVE-2017-2491?
References are available at: https://support.apple.com/en-us/HT207617, https://www.exploit-db.com/exploits/41964/, http://www.zerodayinitiative.com/advisories/ZDI-17-321, http://www.securityfocus.com/bid/98316.