CVE-2014-4422

Vulnerability

The kernel in Apple iOS versions before 8 and Apple TV versions before 7 uses a predictable random number generator during the early portion of the boot process [1][3]. This predictability allows an attacker to bypass certain kernel-hardening protection mechanisms [1][3]

Exploitation

An attacker must have the ability to run a user-space process on the target device and then observe data related to the random numbers generated during early boot [1][3]. The specific sequence of steps involves launching a user-space process that can access or infer the predictable random values, thereby undermining the kernel's security protections [1][3].

Impact

Successful exploitation enables an attacker to bypass kernel-hardening mechanisms, potentially leading to escalated privileges or other unauthorized access to system resources [1][3]. The attacker gains a significant advantage in compromising the kernel's integrity and confidentiality protections [1][3].

Mitigation

Apple addressed the issue by releasing iOS 8 and Apple TV 7, which include fixes for the predictable random number generator [1][3]. Users should update their devices to these versions or later to mitigate the vulnerability. No workarounds are documented in the available references.