Trustwave SpiderLabs Uncovers Ov3r_Stealer Malware Spread via Phishing and Facebook Advertising. Learn More

Trustwave SpiderLabs Uncovers Ov3r_Stealer Malware Spread via Phishing and Facebook Advertising. Learn More

Managed Detection & Response

Eliminate active threats with 24/7 threat detection, investigation, and response.

Co-Managed SOC (SIEM)

Maximize your SIEM investment, stop alert fatigue, and enhance your team with hybrid security operations support.

Advisory & Diagnostics

Advance your cybersecurity program and get expert guidance where you need it most.

Penetration Testing

Test your physical locations and IT infrastructure to shore up weaknesses before exploitation.

Database Security

Prevent unauthorized access and exceed compliance requirements.

Email Security

Stop email threats others miss and secure your organization against the #1 ransomware attack vector.

Digital Forensics & Incident Response

Prepare for the inevitable with 24/7 global breach response in-region and available on-site.

Firewall & Technology Management

Mitigate risk of a cyberattack with 24/7 incident and health monitoring and the latest threat intelligence.

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
About Us
Awards and Accolades
Trustwave SpiderLabs Team
Trustwave Fusion Security Operations Platform
Trustwave Security Colony
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

[Honeypot Alert] Active Probes for Ruby on Rails XML Vulns

In a previous blog post, I outlined some ModSecurity defenses to help protect Ruby on Rails users from the XML parsing vulnerabilities. Hopefully you have had a chance to update RoR for your site. If not, you might want to stop what you are doing and fix it now... We identified a few attack probes on our WASC Distributed Web Honeypot Project sensors recently looking for this vuln.

Here are some screenshots taken from our central AuditConsole host that is using the ModSecurity Audit log data:

Initial String Testing:


The attacker is sending a sample testing string value of "hello".

Testing for YAML parsing vulnerabilities 1:


Attacker then sends the YAML payload with some ruby exploit code however the object is incomplete.

Testing for YAML parsing vulnerabilities 2:


In this final payload, the attacker sends the YAML payload with the ruby code to execute the local time.

Nmap NSE Script

A quick search for those attack payloads turned up a new Nmap NSE script on GitHub called http-rails-xml-parser.nse:


So we have our tool identified. This script doesn't exploit the vulnerabilty but does identify vulnerable hosts. Bottom line is that scripts/tools are out there now and actively scanning the web-o-sphere for vulnerable sites. Better patch/upgrade ASAP....



Latest SpiderLabs Blogs

Trustwave SpiderLabs: Insights and Solutions to Defend Educational Institutions Against Cyber Threats

Security teams responsible for defending educational institutions at higher education and primary school levels often find themselves facing harsh lessons from threat actors who exploit the numerous...

Read More

Breakdown of Tycoon Phishing-as-a-Service System

Just weeks after Trustwave SpiderLabs reported on the Greatness phishing-as-a-service (PaaS) framework, SpiderLabs’ Email Security team is tracking another PaaS called Tycoon Group.

Read More

Trustwave SpiderLabs Uncovers Ov3r_Stealer Malware Spread via Phishing and Facebook Advertising

During an Advanced Continual Threat Hunt (ACTH) investigation that took place in early December 2023, Trustwave SpiderLabs discovered Ov3r_Stealer, an infostealer distributed using Facebook...

Read More