Google released its November 2016 Android security patches to resolve 83 vulnerabilities in the mobile operating system, 23 of which have been rated Critical.
Of the 83 bugs, 37 were rated High risk, 22 were assessed as Medium risk, and one was rated Low.
The first Critical bug was patched in mediaserver, the Android component that prompted Google last year to start issuing monthly security updates for the operating system after researchers discovered the critical Stagefright flaw impacting nearly a billion devices. By exploiting the newly patched flaw, an attacker using a specially crafted file could cause memory corruption during media file and data processing.
The second Critical issue was an Elevation of privilege addressed in the libzipfile component, which could allow a local malicious application to execute arbitrary code within the context of a privileged process. While the first vulnerability impacts only Android 7.0 devices, the second was found to affect Android 4.4.4, 5.0.2, and 5.1.1 devices, Google’s advisory revealed.
Other addressed flaws included: Remote code execution in Skia, libjpeg, and Android runtime; Elevation of privilege in mediaserver, System Server, System UI, Framework APIs, AOSP Launcher, Account Manager, and Bluetooth; Information disclosure in Conscrypt and BoringSSL, download manager, and mediaserver; and Denial of service in Bluetooth, OpenJDK, mediaserver, Proxy Auto Config, and Input Manager Service.
The High risk flaws include Remote code execution in Expat, Webview, and Freetype; Elevation of privilege in kernel performance subsystem, kernel system-call auditing subsystem, Qualcomm crypto engine driver, Qualcomm camera driver, Qualcomm bus driver, and Synaptics touchscreen driver; Information disclosure in kernel components and NVIDIA GPU driver; and Denial of service in mediaserver. The Moderate risk flaws were Information disclosure in kernel components and Qualcomm components which were addressed.