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About 3 Million Android phones are vulnerable to the MTM or Man In The Middle Attack which gives root privileges to attackers. According to BitSight, the issue is due to a vulnerability in the insecure implementation of the OTA (Over-the-Air) update mechanism used by certain low-cost Android devices, including BLU Studio G from US-based Best Buy.
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First Reported in the New York Times, according to The Hacker News Web Site,
There is a pre-installed back door to Android Smart Phones!
Infected Android Smartphone WorldWide
Moreover, it is worth noting that AdUps provides its software to much larger handset manufacturers, such as ZTE and Huawei, which sell their Android phones worldwide, across over 150 countries and regions.
Besides sniffing SMS message content, contact lists, call logs, location data and other personal user information and automatically sending them to AdUps every 72 hours, AdUps' software also has the capability to remotely install and update applications on a smartphone.
The secret backdoor is said to be there intentionally and not accidently or due to a security flaw, although, according to the US authorities, at the moment it is unclear whether the data is being collected for advertising purposes or government surveillance.
Kryptowire says the company discovered the secret backdoor on the device sold by Florida-based smartphone manufacturer BLU Products, which sells its devices in the U.S., and some other countries from South America, online through Amazon and Best Buy.
Massive Amount of Users' Data Sent to Chinese Servers
Based on the received commands, the security firm found the software executing multiple operations, detailed below:
- Collect and Send SMS texts to AdUps' server every 72 hours.
- Collect and Send call logs to AdUps' server every 72 hours.
- Collect and Send user personally identifiable information (PII) to AdUps' server every 24 hours.
- Collect and Send the smartphone's IMSI and IMEI identifiers.
- Collect and Send geolocation information.
- Collect and Send a list of apps installed on the user's device.
- Download and Install apps without the user's consent or knowledge.
- Update or Remove apps.
- Update the phone's firmware and Re-program the device.
- Execute remote commands with elevated privileges on the user's device.
No, Users Can't Disable or Remove the Backdoor
The backdoor has been discovered in two system applications – and – neither of which can be disabled or removed by the user.
On contacting, BLU Products confirmed that approximately 120,000 of its smartphones have the AdUps' software installed, which is being removed from its devices.
"BLU Products has identified and has quickly removed a recent security issue caused by a third-party application which had been collecting unauthorized personal data in the form of text messages, call logs, and contacts from customers using a limited number of BLU mobile devices," the company said in a statement.
"Our customer's privacy and security are of the upmost (sic) importance and priority. The affected application has since been self-updated, and the functionality verified to be no longer collecting or sending this information."
Besides BLU Products, Kryptowire immediately notified Google, AdUps, as well as Amazon, which is the exclusive retailer of the BLU R1 HD, of its findings.
Google also issued a statement saying that the company is working with all affected parties to patch the issue, though the tech giant said that it doesn't know how widely AdUps distributed its software.
However, According to AdUps, its software featured on the smartphone tested by the security firm was not intended to be included on smartphones in the United States market and was just designed to help Chinese phone manufacturers to monitor user behavior.
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