Cisco confirmed the presence of a Backdoor that affects small business devices. The flaw was discovered by the French hacker Eloi Vanderbeken weeks ago.
Cisco has recently disclosed (Advisory ID: cisco-sa-20140110-sbd) the presence of a backdoor in different small business networking devices, it is an undocumented Test Interface that could be exploited by attackers to access user credentials for the administrator account and the device settings. The vulnerability in Cisco Small Business Devices could be also exploited to send arbitrary commands to the device with escalated privileges.
“This vulnerability is due to an undocumented test interface in the TCP service listening on port 32764 of the affected 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. 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.” states the official advisory.
The vulnerabilities are still unpatched, but Cisco announced that a fix will be released soon (by the end of January 2014), the flaw is serious considering that there aren’t workarounds to fix the backdoor.
The French hacker Eloi Vanderbeken on his github page provided the exploit code for the Cisco Small Business Devices, in the past weeks I have posted an article to present his discovery of a backdoor in the main models of routers including Netgear, Linksys and Cisco.
Pierluigi Paganini is member of the ENISA (European Union Agency for Network and Information Security) Threat Landscape Stakeholder Group and Cyber G7 Group, he is also a Security Evangelist, Security Analyst and Freelance Writer.
Editor-in-Chief at "Cyber Defense Magazine", Pierluigi is a cyber security expert with over 20 years experience in the field, he is Certified Ethical Hacker at EC Council in London. The passion for writing and a strong belief that security is founded on sharing and awareness led Pierluigi to find the security blog "Security Affairs" recently named a Top National Security Resource for US.
Pierluigi is a member of the "The Hacker News" team and he is a writer for some major publications in the field such as Cyber War Zone, ICTTF, Infosec Island, Infosec Institute, The Hacker News Magazine and for many other Security magazines.
Author of the Books "The Deep Dark Web" and “Digital Virtual Currency and Bitcoin”.