The network-statistics interface in the kernel in Apple iOS before 8 and Apple TV before 7 does not properly initialize memory, which allows attackers to obtain sensitive memory-content and memory-layout information via a crafted application, a different vulnerability than CVE-2014-4371, CVE-2014-4419, and CVE-2014-4420.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-4421
• https://exchange.xforce.ibmcloud.com/vulnerabilities/96103
• https://support.apple.com/kb/HT6535
• http://archives.neohapsis.com/archives/bugtraq/2014-09/0106.html
• http://archives.neohapsis.com/archives/bugtraq/2014-09/0107.html
• http://archives.neohapsis.com/archives/bugtraq/2014-10/0101.html
• http://lists.apple.com/archives/security-announce/2015/Jan/msg00003.html
• http://support.apple.com/HT204244
• http://support.apple.com/kb/HT6441
• http://support.apple.com/kb/HT6442
• http://www.securityfocus.com/bid/69882
• http://www.securityfocus.com/bid/69924
• http://www.securitytracker.com/id/1030866