CVE-2014-4399

Vulnerability

An unspecified integrated graphics driver routine in the Intel Graphics Driver subsystem of Apple OS X Mavericks does not properly validate calls. The vulnerability affects OS X Mavericks versions 10.9 through 10.9.4 [1]. The issue is one of ten similar vulnerabilities (CVE-2014-4394 through CVE-2014-4401 and CVE-2014-4416) addressed in the same security update [1].

Exploitation

An attacker can exploit this vulnerability by running a crafted application on the target system. No special network position or authentication beyond local access is required, but the application must be able to call the vulnerable graphics driver routine [1]. The exact sequence of steps to trigger the validation failure is not publicly disclosed.

Impact

Successful exploitation allows an attacker to execute arbitrary code in a privileged (kernel) context [1]. This grants full control over the affected system, including the ability to install malware, modify data, or perform other actions with elevated privileges.

Mitigation

Apple released the fix in OS X Mavericks v10.9.5 and Security Update 2014-004, available for download via Software Update or from the Apple Support website [1]. Users should apply the update immediately. No workaround is available for unpatched systems [1].