Feeds

Linksys router ripe for remote takeover

Stealth attack exploits gullible management console

Intelligent flash storage arrays

A security researcher has discovered a flaw in a popular Linksys router that could allow attackers to remotely hijack the device using its web management console.

The Linksys WAG54G2 fails to properly inspect addresses typed in to browsers accessing the management console, allowing attackers to inject powerful shell commands into the router's Linux operating system, researcher Michal Sajdak warns here. The flaw is trivial to exploit when users fail to change the administrative password that's used by default.

"When you are logged in to the web administration, simple injection leads to OS root access," Sajdak writes. "It can be exploited using CSRF and these credentials (assuming a user did not change default user/password). One can still backdoor the router having access to web administration. Another outcome of the bug is an [ability] to quite easily examine what services are running on the router, what is its internal configuration, etc."

Representatives from Cisco, which owns Linksys, didn't respond to a request for comment by time of publication.

The web management console is turned on by default for users on the router's local area network, so the attack seems easiest for unauthorized people who already have access to the network. But using a technique known as CSRF, or cross-site request forgery, remote takeover of the device is also possible.

Sajdak says he notified Cisco of the vulnerability in March but as of Sunday there still was no fix. Users of the device are strongly urged to change the default password, a piece of advice that has fallen on deaf ears in the past.

Update

Web application expert Russ McRee of HolisticInfoSec.org, emailed to say the vulnerability is almost identical to one he found in a separate Linksys router. "When I contacted Linksys regarding a CSRF issue in the WRT160N I was advised that they wouldn't fix it," he wrote.

Linksys representatives still haven't responded to our request for comment. ®

Top 5 reasons to deploy VMware with Tegile

Whitepapers

Choosing cloud Backup services
Demystify how you can address your data protection needs in your small- to medium-sized business and select the best online backup service to meet your needs.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.