A vulnerability called Pork Explosion with the ability to create an Android backdoor was found in the app bootloader...
By submitting your personal information, you agree that TechTarget and its partners may contact you regarding relevant content, products and special offers.
from device manufacturer Foxconn. While the scope of the devices is small, the vulnerability may have serious risks. What does the app bootloader do in this case, and how is the backdoor created?
The information security industry continues to satirize itself with the Pork Explosion vulnerability. Researcher Jon Sawyer found a vulnerability in InFocus and Nextbit smartphones that was introduced by Foxconn during the building and assembly of the devices.
The backdoor was created during Foxconn's design and manufacturing process and appears to be part of the debugging environment used to troubleshoot the device when it was still in development. Including a debug environment is necessary, but it is typically disabled prior to mass production to help protect the security of the device.
The Pork Explosion vulnerability allows an attacker to connect via USB to gain unrestricted root shell access via the app bootloader when booting. The bootloader performs the basic task of hardware initialization and loads the Linux kernel. During this time, the kernel protections are not available.
The risk from this vulnerability is high for physical access to vulnerable devices, but since these devices are not as widely deployed as those made by Samsung or other major manufacturers, the overall risk is low.
Nextbit remediated this vulnerability by removing the file system used in the debug environment.
Enterprises that contract out device or component manufacturing may want to check their supply chains to determine if they have been exposed to vulnerabilities similar to Pork Explosion. If so, those enterprises may want to ensure they have integrated security into their supply chains to prevent vulnerabilities from being introduced that way.
Enterprises may also want to ensure any third parties in their supply chain are responsible for any vulnerabilities they introduce into a device, since the enterprise might not be able to fix the vulnerability themselves.
Find out how to differentiate between a backdoor and a security vulnerability
Read about the Android backdoor that was found in budget device firmware
Learn how security ratings services grade the security postures of third parties
Dig Deeper on Smartphone and PDA Viruses and Threats
Related Q&A from Nick Lewis
Locky ransomware has, again, changed tactics by moving to using LNK files for distribution. Expert Nick Lewis explains how enterprises can adjust ...continue reading
Hajime malware was discovered to have links to the Mirai botnet that launched powerful DDoS attacks last year. Expert Nick Lewis explains how Hajime ...continue reading
Drammer, or a deterministic Rowhammer attack, was found to be more effective on ARM-based mobile devices. Expert Nick Lewis explains the issue with ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.