Menu
Hardcoded SSH key gives backdoor access to Cisco communications manager

Hardcoded SSH key gives backdoor access to Cisco communications manager

Cisco released new software versions to fix the issue and patch another serious vulnerability

An unprotected SSH access key left inside the Cisco Unified Communications Domain Manager product for remote support purposes allows attackers to take complete control of affected deployments.

Cisco Systems released updates Wednesday for the CUCDM platform and application software to correct the backdoor issue and also fix another critical vulnerability that could allow attackers to execute arbitrary commands with privileged access.

CUCDM allows companies to manage their Cisco Unified Communications applications from a single platform. These applications provide video, voice, messaging, mobility, instant messaging (IM) and other collaboration services for enterprise environments.

Administrators are advised to upgrade the CUCDM platform software to version 4.4.2 and the CUCDM application software to version 8.1.4.

The SSH access key issue can be exploited by an unauthenticated remote attacker to access the CUCDM system's root account, which has the highest privileges.

"The vulnerability is due to the presence of a default SSH private key, which is stored in an insecure way on the system," Cisco said in a security advisory. "An attacker could exploit this vulnerability by obtaining the SSH private key. For example, the attacker might reverse engineer the binary file of the operating system."

The other flaw, which enables privilege escalation, is located in the CUCDM application software and stems from the improper implementation of authentication and authorization controls for the Web-based user interface. An attacker can exploit the flaw to change the credentials of an administrative user by opening a specifically crafted URL. The attacker needs to be authenticated as a different user in the system or to trick an active user to click on a malicious link.

The CUCDM application software is also affected by a separate vulnerability that allows unauthenticated attackers to access and modify the information of Web portal users such as settings in the user personal phone directory, speed dials, Single Number Reach, and call forward settings.

There is currently no patch for this vulnerability, but the company has provided mitigation instructions in a separate support document. The flaw will not affect version 10 of the CUCDM application software that's expected to be released in September.

"The vulnerability that is probably going to be exploited first is the backdoor Cisco left behind for support access," said Johannes Ullrich, dean of research at the SANS Technology Institute, in a blog post. "Filtering SSH access to the device at your border is a good first step to protect yourself if you can't patch right away," he said.

Follow Us

Join the New Zealand Reseller News newsletter!

Error: Please check your email address.

Tags patchesSANS Technology Instituteunified communicationsCisco SystemsNetworkingsecurityAccess control and authenticationExploits / vulnerabilities

Slideshows

Top 50 defining moments of the New Zealand channel in 2016

Top 50 defining moments of the New Zealand channel in 2016

Reseller News looks back on a tumultuous 12 months for the New Zealand channel, assessing the fallout from a year of sizeable industry change. Whether it be local or global mergers and acquisitions, distribution deals or job changes, the channel that started the year differs somewhat to the one set to finish it - Reseller News assesses the key moments that made 2016.​

Top 50 defining moments of the New Zealand channel in 2016
​Hewlett Packard Enterprise honours high achieving NZ channel

​Hewlett Packard Enterprise honours high achieving NZ channel

Hewlett Packard Enterprise honoured its top performing Kiwi partners at the second running of its HPE Partner Awards in New Zealand, held at a glitzy ceremony in Auckland. Recognising excellence across eight categories - from distributors to resellers - the tech giant celebrated its first year as a standalone company, following its official split from HP in 2015.

​Hewlett Packard Enterprise honours high achieving NZ channel
Nutanix treats channel partners to Christmas cruise

Nutanix treats channel partners to Christmas cruise

Nutanix recently took to the seas for a Christmas Cruise around Sydney Harbour with its Australia and New Zealand staff, customers and partners to celebrate a stellar year for the vendor. With the sun out, they were all smiles and mingled over drinks and food.

Nutanix treats channel partners to Christmas cruise
Show Comments