Menu
Cisco promises to fix admin backdoor in some routers

Cisco promises to fix admin backdoor in some routers

The company plans to release firmware updates to remove the undocumented feature by the end of the month

Cisco Systems promised to issue firmware updates removing a backdoor from a wireless access point and two of its routers later this month. The undocumented feature could allow unauthenticated remote attackers to gain administrative access to the devices.

The vulnerability was discovered over the Christmas holiday on a Linksys WAG200G router by a security researcher named Eloi Vanderbeken. He found that the device had a service listening on port 32764 TCP, and that connecting to it allowed a remote user to send unauthenticated commands to the device and reset the administrative password.

It was later reported by other users that the same backdoor was present in multiple devices from Cisco, Netgear, Belkin and other manufacturers. On many devices this undocumented interface can only be accessed from the local or wireless network, but on some devices it is also accessible from the Internet.

Cisco identified the vulnerability in its WAP4410N Wireless-N Access Point, WRVS4400N Wireless-N Gigabit Security Router and RVS4000 4-port Gigabit Security Router. The company is no longer responsible for Linksys routers, as it sold that consumer division to Belkin early last year.

The vulnerability is caused by a testing interface that can be accessed from the LAN side on the WRVS4400N and RVS4000 routers and also the wireless network on the WAP4410N wireless access point device.

"An attacker could exploit this vulnerability by accessing the affected device from the LAN-side interface and issuing arbitrary commands in the underlying operating system," Cisco said in an advisory published Friday. "An exploit could allow the attacker to access user credentials for the administrator account of the device, and read the device configuration. The exploit can also allow the attacker to issue arbitrary commands on the device with escalated privileges."

The company noted that there are no known workarounds that could mitigate this vulnerability in the absence of a firmware update.

The SANS Internet Storm Center, a cyber threat monitoring organization, warned at the beginning of the month that it detected probes for port 32764 TCP on the Internet, most likely targeting this vulnerability.


Follow Us

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags securitypatch managementwirelessNetworkingroutersintrusionnetworking hardwareCisco SystemspatchesWLANs / Wi-FiAccess control and authenticationExploits / vulnerabilities

Featured

Slideshows

Meet the leading female front runners of the Kiwi channel

Meet the leading female front runners of the Kiwi channel

Reseller News honoured the leading female front runners of the New Zealand channel at the 2018 Women in ICT Awards (WIICTA) in Auckland. The awards honoured standout individuals across seven categories, spanning Entrepreneur; Innovation; Rising Star; Shining Star; Community; Technical and Achievement.

Meet the leading female front runners of the Kiwi channel
Meet the top performing customer-centric Microsoft channel partners

Meet the top performing customer-centric Microsoft channel partners

Microsoft honoured leading partners across the channel following a year of customer innovation and market growth in New Zealand. The 2018 Microsoft Partner Awards recognised excellence within the context of the end-user, spanning a host of emerging and established providers.

Meet the top performing customer-centric Microsoft channel partners
Reseller News launches new-look Awards at 2018 Judges’ Lunch

Reseller News launches new-look Awards at 2018 Judges’ Lunch

Introducing the Reseller News Innovation Awards, launched to the channel at the 2018 Judges’ Lunch in Auckland. With more than 70 judges now part of the voting panel, the new-look awards will reflect the changing dynamics of the channel, recognising excellence across customer value and innovation - spanning start-ups, partners, distributors and vendors.

Reseller News launches new-look Awards at 2018 Judges’ Lunch
Show Comments