Apple has released software updates fixing 58 vulnerabilities in iOS versions prior to iOS 8.3. These vulnerabilities are caused by problems in various iOS components. There are multiple attack vectors, a remote attacker could entice a user to open a specially crafted web page, font file, configuration profile or iWork file, or install a malicious application to exploit the vulnerabilities. A local attacker could also connect the affected systems with a malicious external device to execute arbitrary code or access protected information of the affected systems.
Depending on the vulnerability exploited, a successful attack could lead to information disclosure, a denial of service condition, elevation of privileges, bypass of security restrictions or remote arbitrary code execution.
The product vendor has released iOS 8.3 to address the issues. Users can obtain the updates by using the auto-update mechanism. Users of affected systems should follow the recommendations provided by the product vendor and take immediate actions to mitigate the risk.
https://support.apple.com/en-us/HT204661
https://www.hkcert.org/my_url/en/alert/15040901
https://www.us-cert.gov/ncas/current-activity/2015/04/08/Apple-Releases-Security-Updates-OS-X-iOS-Safari-and-Apple-TV
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1068
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1084
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1085
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1086
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