The (1) setreuid and (2) setregid system-call implementations in the kernel in Apple iOS before 8.3, Apple OS X before 10.10.3, and Apple TV before 7.2 do not properly perform privilege drops, which makes it easier for attackers to execute code with unintended user or group privileges via a crafted app.
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-1117
Reference (s):
- APPLE:APPLE-SA-2015-04-08-2
- URL: http://lists.apple.com/archives/security-announce/2015/Apr/msg00001.html
- APPLE:APPLE-SA-2015-04-08-3
- URL: http://lists.apple.com/archives/security-announce/2015/Apr/msg00002.html
- APPLE:APPLE-SA-2015-04-08-4