Find Nucleus TCP/IP assets with accessible FTP services

November 10, 2021, by

Pearce Barry

Researchers at Forescout recently published findings on a new set of 13 vulnerabilities with the Nucleus RTOS TCP/IP stack, collectively referred to as NUCLEUS:13. Originally released in 1993, Nucleus is found in many different types of products, including devices in the medical, automation, and OT spaces. Most of the surfaced vulnerabilities in the Nucleus:13 set received CVSS scores in the high range (and one, via the FTP service, has a critical score of 9.8), with successful exploitation yielding information leaks, denial-of-service, or remote code execution.

While Siemens, owner of Nucleus, has released patched firmware, device vendors will still need to utilize these for their affected product lines and push out their own updates. Forescout suggests some mitigation strategies for affected devices, which you can take to help reduce your Nucleus:13 attack footprint while awaiting patches.

How to find Nucleus TCP/IP devices with Rumble

From the Service Inventory, use the following pre-built query to locate Nucleus TCP/IP assets with accessible FTP services in your network:

_asset.protocol:ftp and protocol:ftp and banner:nucleus
Find Nucleus TC/IP devices

As always, any prebuilt queries we create are available from our Queries Library. Check out the library for other useful inventory queries.

Try Rumble

Don’t have Rumble and need help finding your assets potentially vulnerable to NUCLEUS:13? Start your Rumble trial today.

Similar Content

December 3, 2021

Finding HP printers and MFPs vulnerable to Printing Shellz

Do you have HP printers and multi-function printers (MFPs)? You might want to look at the two recently published vulnerabilities that affect 150+ models. Named “Printing Shellz” by the F-Secure security researchers who reported them, these vulns have been around for ~8 …

Read More

October 28, 2021

Finding PAX point-of-sale devices

PAX Technologies, a China-based company that manufactures a LOT of point-of-sale (POS) terminal devices, has been in the news this week following an FBI raid of a PAX Florida facility. While the FBI didn’t officially confirm much beyond serving a court-authorized search, a …

Read More

October 25, 2021

How to find Cisco devices running IOS XE

Cisco recently disclosed a command execution vulnerability that affects some versions of IOS XE SD-WAN software running on Cisco routing devices and virtual instances. With a CVSSv3 score of 7.8, this vulnerability (assigned CVE-2021-1529) is due to inadequate input …

Read More