OSSTMM: A Comprehensive Framework for Systematic Security Testing and Risk Assessment

 OSSTMM

The Open Source Security Testing Methodology Manual (OSSTMM) is a comprehensive security testing and assessment framework. Developed by the Institute for Security and Open Methodologies (ISECOM), OSSTMM provides a systematic and standardized approach to security testing, enabling organizations to identify vulnerabilities, assess risks, and improve their overall security posture.

Key Features of OSSTMM:

1. Peer-Reviewed Methodology: OSSTMM is continuously updated and peer-reviewed to stay relevant to the current state of security testing.
2. Scientific Approach: It emphasizes using metrics, measurements, and statistical analysis to quantify the effectiveness of security controls.
3. Comprehensive Coverage: The manual covers various aspects of security testing, including network security, physical security, web application security, wireless security, and social engineering.
4. Five Key Sections:

• Information Security: Assessing data confidentiality, integrity, and availability.
• Physical Security: Evaluating physical security measures for premises and equipment.
• Telecommunications and Networking Security: Assessing network infrastructure security.
• Personnel Security: Evaluating employee adherence to security policies and procedures.
• Compliance and Reporting: Providing guidelines for compliance and detailed reporting.

Benefits of Using OSSTMM:

• Consistency: Ensures a consistent and reliable approach to security testing.
• Collaboration: Facilitates communication between security professionals, auditors, and stakeholders.
• Continuous Improvement: Encourages ongoing assessment and updating of security measures to stay ahead of emerging threats.

This post is covered in CySA+ and Pentest+.

WPScan: The Ultimate Tool for WordPress Vulnerability Detection

 WPScan

WPScan is a free, open-source command line tool that scans WordPress websites for vulnerabilities:

What it does

WPScan checks for vulnerabilities in WordPress core, plugins, and themes. It also checks for weak passwords and exposed files.

How it works

WPScan mimics an attacker by not relying on access to your WordPress dashboard or source code.

Features

WPScan includes:

• A database of WordPress vulnerabilities that's continuously updated by WordPress security professionals
• A plugin that fits into existing workflows
• A CLI security scanner for security professionals
• An API for accessing the vulnerability database

Key Features:

• Vulnerability Detection: WPScan scans for known vulnerabilities in WordPress core, themes, and plugins using the WPScan Vulnerability Database.
• Enumeration: It can enumerate various aspects of a WordPress site, such as installed plugins, themes, and user accounts.
• Brute Force Testing: WPScan can perform brute force attacks to test the strength of user passwords.
• Customizable Scans: Users can customize their scans with various options, such as using a random user agent, throttling requests, or running in stealth mode to avoid detection.

How WPScan Works:

• Basic Scan: To perform a basic scan, you can use the following command: 

wpscan --url yourwebsite.com

This command will scan the specified website and provide information about its WordPress version, themes, plugins, and other potential vulnerabilities.

• Enumerating Plugins:

wpscan --url yourwebsite.com --enumerate vp

This command will enumerate all vulnerable plugins on the specified website.

• User Enumeration:

wpscan --url yourwebsite.com --enumerate u

This command will list all user accounts that can be discovered from the outside.

• Brute Force Attack:

wpscan --url yourwebsite.com --passwords /path/to/passwordlist.txt --usernames admin

This command will attempt to brute force the password for the specified username using a list of passwords.

How to use it

You can use additional flags to get specific information. For example, to search for vulnerable plugins, you can use the command wpscan --url yourwebsite.com -e vp --api-token YOUR_TOKEN.

Who uses it

WordPress administrators and security teams use WPScan to assess the security of their WordPress installations.

You can regularly scan your WordPress site for malware at least once per month. You should also run a scan whenever you change your website's structure or install new plugins.

This post is covered in CySA+ and Pentest+

Hydra Tool Overview: Enhancing Security Testing with Brute-Force and Dictionary Attacks

 HYDRA

Hydra (THC-Hydra) is a powerful and flexible password-cracking tool used primarily for brute-force attacks on various network services. It is widely used by penetration testers, security researchers, and ethical hackers to test the security of systems by attempting to crack passwords. Here are some key points about Hydra:

Key Features:

• Multi-Protocol Support: Hydra supports many protocols, including SSH, FTP, HTTP, HTTPS, SMB, and databases.
• Parallelized Attacks: Hydra can perform multiple login attempts simultaneously, making it faster than sequential brute-force tools.
• Flexible and Extensible: Hydra can easily be expanded with new modules, supporting additional protocols and attack methods.

How Hydra Works:

• Brute-Force Attacks: Hydra attempts to gain access by systematically trying different combinations of usernames and passwords until it finds the correct one.
• Dictionary Attacks: It can use a list of common passwords (a dictionary) to try against a given username.
• Password Spraying: Hydra can test a single password against multiple usernames to identify weak passwords used by different users.

Basic Usage:

• Single Username and Password:

hydra -l username -p password target service

Example:

hydra -l admin -p admin123 192.168.1.1 ssh

• Using a Password List:

hydra -l username -P /path/to/passwordlist.txt target service

Example:

hydra -l admin -P /usr/share/wordlists/rockyou.txt 192.168.1.1 ssh 

• Using a Username List:

hydra -L /path/to/userlist.txt -p password target service

Example:

hydra -L /usr/share/wordlists/usernames.txt -p admin123 192.168.1.1 ssh

Important Considerations:

• Legal and Ethical Use: Hydra should only be used for authorized testing and with permission from the system owner. Unauthorized use is illegal and unethical.
• Logging and Output: Hydra can save the results of its attempts to a file for later analysis using the -o option.

Hydra is a versatile tool that, when used responsibly, can help improve system security by identifying weak passwords and potential vulnerabilities.

This post is covered in CySA+ and Pentest+

Using Setenforce to Manage SELinux Modes: A Quick Guide

 SELinux setenforce Command

"Setenforce" is a Linux command used to temporarily change the mode of Security-Enhanced Linux (SELinux) between "enforcing" and "permissive" states. It controls whether SELinux actively blocks unauthorized actions or logs them as warnings. You can switch to permissive mode to troubleshoot potential SELinux conflicts without restarting the system, but remember that changes made with "setenforce" do not persist after a reboot.

Key points about setenforce:

Function:

To toggle between SELinux modes, select "enforcing" (strict security enforcement) or "permissive" (log violations without blocking them).

Command usage:

• To switch to permissive mode, setenforce 0
• To switch to enforcing mode: setenforce 1

Checking current mode:

Use the getenforce command to see the current SELinux mode.

Important consideration:

Changes made with "setenforce" only last until the system is rebooted. To permanently change SELinux mode, modify the /etc/selinux/config file.

This post is covered in Security+ and Server+

Understanding SELinux: Enhancing Linux Security with Mandatory Access Controls

 SELinux

Security-Enhanced Linux (SELinux) is a security architecture integrated into the Linux kernel that provides a mechanism for supporting access control security policies, including mandatory access controls (MAC). It was originally developed by the United States National Security Agency (NSA) and released to the open-source community in 2000.

Key Features of SELinux:

• Access Control: SELinux allows administrators to define security policies that control which users and processes can access specific files and resources on the system.
• Security Policies: These are sets of rules that dictate what can or cannot be accessed. SELinux enforces these policies to control access.

Modes of Operation:

• Enforcing: SELinux enforces the security policies and denies access based on these policies.
• Permissive: SELinux logs actions that would have been denied if it were in enforcing mode but does not deny access.
• Disabled: SELinux is turned off.
• Type Enforcement: This is the primary mechanism used by SELinux to enforce policies. It assigns types to all files, processes, and ports and uses these types to control access.

How SELinux Works:

When an application or process (subject) requests access to an object (like a file), SELinux checks the access vector cache (AVC) for permissions. If the permissions are not cached, it consults the security server, which checks the security context from the SELinux policy database to grant or deny access.

Benefits:

• Enhanced Security: By enforcing strict access controls, SELinux helps prevent unauthorized access and limits the potential damage from security breaches.
• Granular Control: Administrators can define policies to control access at a granular level.

This post is covered in Security+ and Server+.

Understanding MPLS: Enhancing Network Speed and Efficiency

 MPLS Explained

MPLS stands for Multiprotocol Label Switching. It is a data-forwarding technology that speeds up and shapes traffic flows across enterprise-wide area networks (WANs) and service provider networks.

How MPLS Works

• Label Assignment: When a data packet enters an MPLS network, it is assigned a label. This label is used to make forwarding decisions instead of relying on the packet's IP address.
• Label-Switched Paths (LSPs): MPLS establishes predetermined paths, known as Label-Switched Paths, for packets to travel across the network. These paths are set up based on the labels assigned to the packets.
• Forwarding Equivalence Class (FEC): Packets are grouped into Forwarding Equivalence Classes, which determine their path. All packets in the same FEC follow the same path.
• Label Switching: As packets travel through the network, each router (or switch) reads the label and forwards the packet to the next hop in the path. The label can be swapped at each hop to guide the packet to its destination.
• Layer 2.5 Protocol: MPLS operates between the data link layer (Layer 2) and the network layer (Layer 3) of the OSI model, often referred to as a "Layer 2.5" protocol.

Benefits of MPLS

• Speed and Efficiency: MPLS reduces the time routers spend processing packets by using labels to make forwarding decisions, leading to faster data transmission.
• Traffic Engineering: MPLS allows for better traffic management by directing data along specific paths, which can help avoid congestion and optimize network performance.
• Scalability: MPLS can support a wide range of access technologies and can be scaled to accommodate growing network demands.
• Quality of Service (QoS): MPLS supports QoS by prioritizing certain types of traffic, ensuring critical applications receive the necessary bandwidth and low latency.

MPLS Use Case

Consider a company with multiple branch offices. Using MPLS, the company can create dedicated paths for different types of traffic, such as VoIP calls and video conferencing, ensuring these critical services have the necessary bandwidth and low latency for optimal performance.

MPLS is widely used in enterprise networks and by service providers to deliver reliable, high-performance network services.

This post is covered in Network+.

Understanding SD-WAN: Enhancing Network Performance and Security

 SDN (Software-Defined WAN)

SD-WAN stands for Software-Defined Wide Area Network. A virtual WAN architecture allows enterprises to leverage any combination of transport services, including MPLS, LTE, and broadband internet services, to securely connect users to applications.

How SD-WAN Works

• Separation of Control and Data Planes: SD-WAN separates the control plane (which decides where traffic should go) from the data plane (which actually forwards the traffic). This separation allows for more flexible and efficient network management.
• Centralized Management: SD-WAN uses a centralized controller to manage the network. This controller can dynamically route traffic based on network conditions, application requirements, and business policies.
• Application-Aware Routing: SD-WAN can identify different types of traffic and route them accordingly. For example, critical business applications can be prioritized over less important traffic.
• Transport Independence: SD-WAN can use multiple types of connections (e.g., MPLS, broadband, LTE) and dynamically switch between them to ensure optimal performance and reliability.
• Enhanced Security: SD-WAN includes built-in security features such as encryption, firewall, and secure web gateways to protect data across the network.

Benefits of SD-WAN

• Cost Savings: Organizations can reduce their WAN costs by using cheaper broadband connections alongside or instead of expensive MPLS circuits.
• Improved Performance: SD-WAN can optimize the performance of cloud-based applications by routing traffic over the best available path.
• Simplified Management: Centralized management and zero-touch provisioning make deploying and managing the network easier.
• Scalability: SD-WAN can easily scale to accommodate new sites and increased bandwidth demands.

Example Use Case

Imagine a company with multiple branch offices. Traditionally, each branch might connect to the main office via dedicated MPLS lines. With SD-WAN, the company can use a mix of MPLS and broadband connections, dynamically routing traffic to ensure the best performance and reliability while reducing costs.

SD-WAN is particularly beneficial for organizations that rely heavily on cloud services and need a flexible, cost-effective way to manage their wide area networks.

This post is covered in CySA+, Network+, and Security+.