SANS 20 Critical Security Controls
A couple days ago, The SANS Institute announced the release of a major update (Version 3.0) to the 20 Critical Controls, a prioritized baseline of information security measures designed to provide continuous monitoring to better protect government and commercial computers and networks from cyber attacks. The information security threat landscape is always changing, especially this year with the well publicized breaches. The particular controls have been tested and provide an effective solution to defending against cyber-attacks. The focus is critical technical areas than can help an organization prioritize efforts to protect against the most common and dangerous attacks. Automating security controls is another key area, to help gauge and improve the security posture of an organization. The update takes into account the information gleaned from law enforcement agencies, forensics experts and penetration testers who have analyzed the various methods of attack. SANS outlines the controls that would have prevented those attacks from being successful. Version 3.0 was developed to take the control framework to the next level. They have realigned the 20 controls and the associated sub-controls based on the current technology and threat environment, including the new threat vectors. Sub-controls have been added to assist with rapid detection and prevention of attacks. The 20 Controls have been aligned to the NSA’s Associated Manageable Network Plan Revision 2.0 Milestones. They have added definitions, guidelines and proposed scoring criteria to evaluate tools for their ability to satisfy the requirements of each of the 20 Controls. Lastly, they have mapped the findings of the Australian Government Department of Defence, which produced the Top 35 Key Mitigation Strategies, to the 20 Controls, providing measures to help reduce the impact of attacks. The 20 Critical Security Controls are: Inventory of Authorized and Unauthorized Devices Inventory of Authorized and Unauthorized Software Secure Configurations for Hardware and Software on Laptops, Workstations, and Servers Secure Configurations for Network Devices such as Firewalls, Routers, and Switches Boundary Defense Maintenance, Monitoring, and Analysis of Security Audit Logs Application Software Security Controlled Use of Administrative Privileges Controlled Access Based on the Need to Know Continuous Vulnerability Assessment and Remediation Account Monitoring and Control Malware Defenses Limitation and Control of Network Ports, Protocols, and Services Wireless Device Control Data Loss Prevention Secure Network Engineering Penetration Tests and Red Team Exercises Incident Response Capability Data Recovery Capability Security Skills Assessment and Appropriate Training to Fill Gaps And of course, F5 has solutions that can help with most, if not all, the 20 Critical Controls. ps Resources: SANS 20 Critical Controls Top 35 Mitigation Strategies: DSD Defence Signals Directorate NSA Manageable Network Plan (pdf) Internet Storm Center Google Report: How Web Attackers Evade Malware Detection F5 Security Solutions
Is blocking all HTTP-HEAD requesta a bad idea?
We think about blocking all HTTP Head requests for our Web-Applications (not REST or SOAP) via ASM, by returning a html response page with HTTP-code 200 OK, because most of them are requests from crawlers. Are there experiences concerning client behavior? Since HTTP-200 is returned, the client thinks that the request ist valid, even if the site doesn't exists. For Office-Doks, which constain invalid web links the user doesn't get a info popup which tells him that the ressource doesn't exists, instead the web-client is opened which then sends a HTTP-GET to a non existing ressource. For me it doesn't sound like a major drawback. Are there any other pitfalls known?
Inspect POST Request for Existence of Username Parameter
Is it possible to to check if a username has been provided in a POST request? Could this be done via HTTP::username command or would a HTTP::collect be needed to inspect the payload of the request? Would you be able to provide an example of how this might be done via an Irule.ICSA Certified Network Firewall for Data Centers
The BIG-IP platform is now ICSA Certified as a Network Firewall. Internet threats are widely varied and multi-layered. Although applications and their data are attackers’ primary targets, many attackers gain entry at the network layer. Internet data centers and public-facing web properties are constant targets for large-scale attacks by hacker/hactivist communities and others looking to grab intellectual property or cause a service outage. Organizations must prepare for the normal influx of users, but they also must defend their infrastructure from the daily barrage of malicious users. Security administrators who manage large web properties are struggling with security because traditional firewalls are not meeting their fundamental performance needs. Dynamic and layered attacks that necessitate multiple-box solutions, add to IT distress. Traditional firewalls can be overwhelmed by their limited ability to scale under a DDoS attack while keeping peak connection performance for valid users, which renders not only the firewalls themselves unresponsive, but the web sites they are supposed to protect. Additionally, traditional firewalls’ limited capacity to interpret context means they may be unable to make an intelligent decision about how to deliver the application while also keeping services available for valid requests during a DDoS attack. Traditional firewalls also lack specialized capabilities like SSL offload, which not only helps reduce the load on the web servers, but enables inspection, re-encryption, and certificate storage. Most traditional firewalls lack the agility to react quickly to changes and emerging threats, and many have only limited ability to provide new services such as IP geolocation, traffic redirection, traffic manipulation, content scrubbing, and connection limiting. An organization’s inability to respond to these threats dynamically, and to minimize the exposure window, means the risk to the overall business is massive. There are several point solutions in the market that concentrate on specific problem areas; but this creates security silos that only make management and maintenance more costly, more cumbersome, and less effective. The BIG-IP platform provides a unified view of layer 3 through 7 for both general and ICSA required reporting and alerts, as well as integration with SIEM vendors. BIG-IP Local Traffic Manager offers native, high-performance firewall services to protect the entire infrastructure. BIG-IP LTM is a purpose-built, high-performance Application Delivery Controller designed to protect Internet data centers. In many instances, BIG-IP LTM can replace an existing firewall while also offering scale, performance, and persistence. Performance: BIG-IP LTM manages up to 48 million concurrent connections and 72 Gbps of throughput with various timeout behaviors, buffer sizes, and more when under attack. Protocol security: The BIG-IP system natively decodes IPv4, IPv6, TCP, HTTP, SIP, DNS, SMTP, FTP, Diameter, and RADIUS. Organizations can control almost every element of the protocols they’re deploying. DDoS prevention capabilities: An integrated architecture enables organizations to combine traditional firewall layers 3 and 4 with application layers 5 through 7. DDoS mitigations: The BIG-IP system protects UDP, TCP, SIP, DNS, HTTP, SSL, and other network attack targets while delivering uninterrupted service for legitimate connections. SSL termination: Offload computationally intensive SSL to the BIG-IP system and gain visibility into potentially harmful encrypted payloads. Dynamic threat mitigation: iRules provide a flexible way to enforce protocol functions on both standard and emerging or custom protocols. With iRules, organizations can create a zero day dynamic security context to react to vulnerabilities for which an associated patch has not yet been released. Resource cloaking and content security: Prevent leaks of error codes and sensitive content. F5 BIG-IP LTM has numerous security features so Internet data centers can deliver applications while protecting the infrastructure that supports their clients and, BIG-IP is now ICSA Certified as a Network Firewall. ps Resources: F5’s Certified Firewall Protects Against Large-Scale Cyber Attacks on Public-Facing Websites F5 BIG-IP Data Center Firewall – Overview BIG-IP Data Center Firewall Solution – SlideShare Presentation High Performance Firewall for Data Centers – Solution Profile The New Data Center Firewall Paradigm – White Paper Vulnerability Assessment with Application Security – White Paper Challenging the Firewall Data Center Dogma Technorati Tags: F5, big-ip, virtualization, cloud computing, Pete Silva, security, icsa, iApp, compliance, network firewall, internet, TMOS, big-ip, vCMPIn 5 Minutes or Less Video - BIG-IP APM & Citrix XenApp
Watch how F5 customers can now simply use BIG-IP Access Policy Manager or BIG-IP Edge Gateway to consolidate access control in a central location, keeping infrastructure administration concerns to a minimum. With BIG-IP solutions, customers enjoy the flexibility and scalability needed to extend Citrix applications to both local and remote users without changing local XenApp deployments or requiring STA to provide secure remote access to applications. Highlights of deploying Citrix and F5 technologies together include: Reduced Management Time and OpEx – By simplifying and centralizing local and remote access authentication, BIG-IP solutions eliminate the need for customers to add separate Citrix STA infrastructure or make changes to existing Web Interface servers, resulting in an environment that is less expensive to deploy and requires less time to manage. Simplified Configuration and Deployment – With BIG-IP solutions, administrators can support users of Citrix applications with fewer devices, configure deployments to support flexible access models, and easily scale the environment. This fully integrated functionality makes it quick and easy for customers to set up and deploy local and remote access capabilities for Citrix applications, keeping users productive. Centralized and Comprehensive Access Control – Unlike the separate Citrix products required to adequately support applications for remote users, BIG-IP solutions provide centralized application access control and use a single access policy to support all types of users securely, so IT teams can be confident that application access is aligned with the organizations’ specific business priorities and security policies. &amplt;/p&ampgt; &amplt;p&ampgt;ps&amplt;/p&ampgt; &amplt;p&ampgt;Resources:&amplt;/p&ampgt; &amplt;ul&ampgt; &amplt;li&ampgt;&amplt;a href="http://www.f5.com/news-press-events/press/2010/20101214.html" _fcksavedurl="http://www.f5.com/news-press-events/press/2010/20101214.html"&ampgt;F5 Simplifies and Centralizes Access Management for Citrix Applications&amplt;/a&ampgt; &amplt;/li&ampgt; &amplt;li&ampgt;&amplt;a href="downloads.f5.com" _fcksavedurl="downloads.f5.com"&ampgt;BIG-IP v10.2.1 Download (Log in required)&amplt;/a&ampgt; &amplt;/li&ampgt; &amplt;li&ampgt;&amplt;a href="http://www.f5.com/products/big-ip/access-policy-manager.html" _fcksavedurl="http://www.f5.com/products/big-ip/access-policy-manager.html"&ampgt;BIG-IP Access Policy Manager&amplt;/a&ampgt; 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ps Resources: F5 Simplifies and Centralizes Access Management for Citrix Applications BIG-IP v10.2.1 Download (Log in required) BIG-IP Access Policy Manager BIG-IP Edge Gateway F5 YouTube ChannelDo You Splunk 2.0
A little over two years ago I blogged Do you Splunk? about the reporting integration with our FirePass SSL VPN and BIG-IP ASM. The Splunk reports have provided customers valuable insight into application access and user behavior along with deep analysis of application violations, web attacks and other key metrics. Recently, Splunk and F5 have been working behind the scenes and now you can also get 22 different templates for detailed reporting on the BIG-IP Access Policy Manager. BIG-IP APM is a flexible, high-performance access and security solution that runs as a module on BIG-IP LTM. Splunk is the data engine for IT. It collects, indexes and harnesses the fast-moving IT data generated by all of your IT systems and infrastructure - whether physical, virtual or in the cloud and correlates various pieces of data sources to provide new views and new insights. Splunk makes it possible to search and navigate data from any application, server or network device from a web browser, in real time. Logs, configurations, messages, traps, alerts, and scripts: if a machine generates it, Splunk will index it. The Splunk for F5 App provides real-time dashboards for monitoring key performance metrics. Reports from Splunk support long-term trending and can be downloaded in PDF or Excel formats or scheduled for email delivery. The F5 App supports core Splunk functionality such as deep drill-down from graphical elements, robust role-based access controls and Splunk’s award-winning search capabilities. The following are a sample of the reports available in this version of Splunk for F5 using ASM, APM and FirePass data: Request Status Over Time Top Attacker Top Sites Top Violations Active Sync by Device Type Top Device Type Top User Geo-location Reports Session Duration and Throughput Authentication Success/Failure Connections by User Failed Connections by User All Connections Over Time Splunk also has the unique ability to augment data from FirePass and ASM by connecting to and gathering data from Active Directory or LDAP and asset management databases that can highlight asset or application owner information. Businesses are faced with competing challenges when it comes to granting their mobile workforce access to company data. The data must be readily accessible to users on the go but at the same time companies must protect and safeguard their internal systems that contain sensitive information. Robust monitoring controls are a must for maintaining auditing access, enabling dynamic application access and preventing data loss and availability issues. Resources: Splunk for F5 F5 Networks Partner Spotlight - Splunk Knowledgebase: Splunk for Use with F5 Networks Solutions Video: Splunk for Use with F5 Networks Solutions Splunk Templates for BIG-IP Access Policy Manager (pdf) Splunk for FirePass SSL VPN (pdf) Splunk for Application Security Manager (pdf) ASM & Splunk integration F5 Security Community Group on DevCentral Do you Splunk?
How to limit access by time?
Dear community, I need to handle requests for a particular domain in a different way. I usually apply a few simple conditions, for example, requests must arrive with the xpto.com header to be forwarded to the pool. I use a BIG-IP LTM 13.0.0. Now I need a particular domain, if it is called more than 50 times in 10 minutes by a same IP, block this IP for 30 minutes. From what I've been researching I believe that the FLOW_INIT function helps me with what I need, but I still can not reach my goal. Below is a simple example of what I use to test: when HTTP_REQUEST { if {[HTTP::host] equals "drop.test:8080"} { switch -glob [HTTP::uri] { "/test/*" { log local0. "/test/ - accept - source: [IP::remote_addr] - uri: [HTTP::host][HTTP::uri]" HTTP::respond "Test ok!" } "/drop/*" { log local0. "/drop/ - accept - source: [IP::remote_addr] - uri: [HTTP::host][HTTP::uri]" HTTP::respond "Drop ok!" } default { log local0. "reject - source: [IP::remote_addr] - uri: [HTTP::host][HTTP::uri]" reject } } } }OWASP Tactical Access Defense Series: Broken Object Property Level Authorization and BIG-IP APM
AUTHOR NOTE: Unauthorized access to private/sensitive object properties may result in data disclosure, data loss, or data corruption. Under certain circumstances, unauthorized access to object properties can lead to privilege escalation or partial/full account takeover. In this article we are going through API3 item from OWASP top 10 API Security risks exploring BIG-IP Access Policy Manager (APM) role in our arsenal. Identifying Vulnerable APIs In order to identify the API endpoint is vulnerable to Broken Object Property Level Authorization, Sensitive properties exposure of certain object for non-intended user (Excessive Data Exposure). import requests # Assuming the API endpoint for retrieving user data is /api/users api_endpoint = "https://example.com/api/users" # Sending a GET request to the API endpoint response = requests.get(api_endpoint) # Checking if the request was successful (status code 200) if response.status_code == 200: # Printing the response content (which could contain excessive data) print(response.json()) else: print("Failed to retrieve data from the API") API allow to change, add or delete sensitive object property for non-intended user (Mass assignment). import requests # Assuming the API endpoint for updating user information is /api/users api_endpoint = "https://example.com/api/users" # Malicious payload containing additional fields malicious_payload = { "username": "malicious_user", "password": "password123", "isAdmin": True # Malicious user attempts to elevate privileges } # Sending a POST request with the malicious payload response = requests.post(api_endpoint, json=malicious_payload) # Checking if the request was successful (status code 200) if response.status_code == 200: print("User information updated successfully") else: print("Failed to update user information") Object Property Level Authorization involves controlling access to specific properties or attributes of an object within a system. Instead of granting blanket access to an entire object, this approach enables fine-grained control, allowing administrators to restrict or permit access to individual properties based on user roles or permissions. While implementing protection against such security risk involves different aspects, one is making sure the user is authorized to access object property, and here BIG-IP APM plays crucial role. Mitigating Risks with BIG-IP APM BIG-IP APM per-request granularity. With per-request granularity, organizations can dynamically enforce access policies based on various factors such as user identity, device characteristics, and contextual information. This enables organizations to implement fine-grained access controls at the API level, mitigating the risks associated with Broken Object Property Level Authorization. Key Features: Dynamic Access Control Policies: BIG-IP APM empowers organizations to define dynamic access control policies that adapt to changing conditions in real-time. By evaluating each API request against these policies, BIG-IP APM ensures that only authorized users can access specific resources and perform permitted actions. Granular Authorization Rules: BIG-IP APM enables organizations to define granular authorization rules that govern access to individual objects or resources within the API ecosystem. By enforcing strict authorization checks at the object level, F5 APM prevents unauthorized users from tampering with sensitive data or performing unauthorized actions. Conclusion In conclusion, BIG-IP APM per-request granularity is a powerful tool for defending against Broken Object-Level Authorization vulnerabilities in APIs. By enforcing fine-grained access controls at the API level, organizations can mitigate the risks associated with unauthorized access to sensitive data. Additionally, proactive security assessments and vulnerability scans are essential for identifying and addressing vulnerabilities in APIs, thereby strengthening overall security posture in the digital ecosystem. Related Content F5 BIG-IP Access Policy Manager | F5 Introduction to OWASP API Security Top 10 2023 OWASP Top 10 API Security Risks – 2023 - OWASP API Security Top 10 API Protection Concepts OWASP Tactical Access Defense Series: How BIG-IP APM Strengthens Defenses Against OWASP Top 10 OWASP Tactical Access Defense Series: Broken Object Level Authorization and BIG-IP APM F5 Hybrid Security Architectures (Part 5 - F5 XC, BIG-IP APM, CIS, and NGINX Ingress Controller) OWASP Tactical Access Defense Series: Broken Authentication and BIG-IP APM
