Advisory Details

March 12th, 2015

(Mobile Pwn2Own) Google Android Bluetooth Forced Pairing Vulnerability

ZDI-15-092
ZDI-CAN-2616

CVE ID CVE-2014-7914
CVSS SCORE 4.8, (AV:A/AC:L/Au:N/C:P/I:P/A:N)
AFFECTED VENDORS Google
AFFECTED PRODUCTS Android
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Google Android. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the Bluetooth application stack allowing for arbitrary Host Controller Interface commands to be issued without prior pairing. By obtaining a Bluetooth address, creating and emulating a Bluetooth out-of-band 'handover' NFC NDEF tag, and sniffing encryption keys and exchanging them with the device, an attacker can force pairing with a Bluetooth device. A remote attacker can use this to achieve remote code execution under the context of the process.

VENDOR RESPONSE Google has issued an update to correct this vulnerability. More details can be found at:
https://android.googlesource.com/platform/external/bluetooth/bluedroid/+/0360aa7c418152a3e5e335a065ac3629cbb09559
DISCLOSURE TIMELINE
  • 2014-11-19 - Vulnerability reported to vendor
  • 2015-03-12 - Coordinated public release of advisory
CREDIT Adam Laurie
Aperture Labs
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