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

Embeddable Web Application Firewalls and Impedance Mismatch

Some of you may remember I wrote about impedance mismatch that occurs between security layers. Ryan Barnett made an interesting post to the mod-security-users mailing list the other day:

Those of you running Snort in addition to ModSecurity undoubtedly saw the Snort URI rule bypass bug announced last week -

I run both Snort and ModSecurity in my DMZ segment to identify/prevent HTTP attacks. They are a great compliment to each other as they are different tools - 1 a network-based IDS and 1 an embedded WAF within Apache.

Nothing highlights the differences between the 2 and how they handle HTTP data more than this type of vulnerability announcement. Snort is doing the best that it can to interrogate HTTP transactions however the fact is that it is not a web server so there will be mistakes made as it analyzes data. ModSecurity, on the other hand, is integrate into Apache and therefore does not fall victim to this type of HTTP evasion attack.

When this announcement was released, I quickly ran some tests between Snort and ModSecurity to verify that ModSecurity did in fact identify and block my requests with inserted "\r" return characters. Due to the fact that I use the script to translate all of the Snort web attack sigs, I had absolutely zero loss of IDS coverage on my web servers while I upgraded/patched Snort :)

He makes an interesting point. It is obvious that running embedded has both positive and negative aspects. Being able to see exactly how web server parses requests is a positive one.

Latest SpiderLabs Blogs

Welcome to Adventures in Cybersecurity: The Defender Series

I’m happy to say I’m done chasing Microsoft certifications (AZ104/AZ500/SC100), and as a result, I’ve had the time to put some effort into a blog series that hopefully will entertain and inform you...

Read More

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