(Pwn2Own) Apple iOS mediaserverd crte Out-Of-Bounds Access Privilege Escalation Vulnerability

2019-01-24T00:00:00
ID ZDI-19-125
Type zdi
Reporter Anonymous
Modified 2019-06-22T00:00:00

Description

This vulnerability allows local attackers to escalate privileges on vulnerable installations of Apple iOS. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of crte messages within the mediaserverd service. The issue results from the lack of proper validation of user-supplied data, which can result in a memory access past the end of an allocated object. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root.