Heap-based buffer overflow in Google Android - CVE-2019-11516

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error when processing data within eir_getReceivedEIR() called by bthci_event_SendInquiryResultEvent(). In order to exploit this bug, an attacker must repeatedly connect to the victim's device in a short amount of time from different source addresses. This will cause the victim's Bluetooth stack to resolve the device names and therefore allocate buffers with attacker-controlled data. Due to the heap corruption, the name will be eventually written to an attacker-controlled location. A remote attacker can pass a specially crafted file to the affected application, trigger heap-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

How to mitigate CVE-2019-11516

Sources

• https://community.cypress.com/thread/53681
• https://source.android.com/security/bulletin/2019-08-01
• https://www.cisecurity.org/advisory/multiple-vulnerabilities-in-google-android-os-could-allow-for-arbitrary-code-execution_2019-078/
• https://www.techrepublic.com/article/android-security-bulletin-august-2019-what-you-need-to-know/