Apple iTunes before 11.2.1 on OS X sets world-writable permissions for /Users and /Users/Shared during reboots, which allows local users to modify files, and consequently obtain access to arbitrary user accounts, via standard filesystem operations.
http://support.apple.com/kb/HT6251
Source: MITRE
Published: 2014-05-18
Updated: 2014-05-19
Type: CWE-264
Base Score: 4.4
Vector: AV:L/AC:M/Au:N/C:P/I:P/A:P
Impact Score: 6.4
Exploitability Score: 3.4
Severity: MEDIUM