More than 15.2% of the Algerian population use Internet service which is provided by around 30 Internet Service Providers and one of the largest shares is served by Algerie Telecom.
Algerie Telecom provides TP-LINK TD-W8951ND Router to most of their home customers who Opt-In for Internet services and each of which has ZYXEL embedded firmware installed in it.
ABDELLI Nassereddine, penetration tester and Algerian Computer Science Student has reported highly critical unauthorized access and password disclosure vulnerabilities in the Routers provided by Algerie Telecom.
He said that the vulnerabilities can be exploited by any remote hacker just by exploiting a very simple loophole in the firmware.
First, he found that an unauthorized access is available to 'Firmware/Romfile Upgrade' Section on the Router's panel that can be accessed without any login password i.e. http://IP//rpFWUpload.html
This page actually allows a user to upgrade the Firmware of the router and also allows to download the Romfile Backup file (rom-0) i.e. http://IP address/rom-0 (as shown)
This Romfile contains the administrative password of the Router and can be retrieved in plain text by reverse engineering it using a free online service: Routerpwn ZynOS Configuration Decompressor. One just need to upload the Romfile and can get plain text output easily. Router's password will be displaced in the very first line of the output, as shown below:
He claimed that he has tested the IP address range that belongs to Algeria i.e. 41.107. x. x and found thousands of them are vulnerable to hackers.
A Quick search on SHODAN Search Engine using keyword 'RomPager country:dz' showing more than 2,59,744 devices available on the Internet and 95% of them are now at risk.
ABDELLI also submitted an automated exploit POC script on GITHUB, that can scan the complete subnet for vulnerable routers and will display respective passwords on the screen, as shown:
There is no patch yet available from the vendor, so to prevent yourself from such vulnerability you can forward port 80 to any other website or unused IP address of your network.
