How Can You Secure Your Cloud & DevOps Environments?

Public cloud is provided by vendors such as Google, AWS or Azure and offers infrastructure accessible through a portal. The provider integrates resources into its infrastructure that are made available to organizations. These vary by provider but can include compute, storage, applications, databases, networking and security capabilities.

Public cloud delivers scalability, resource availability, computing power and international reach that legacy hosting organizations cannot match. The most common providers are AWS, Microsoft Azure, Google Cloud and Alibaba. 

Public cloud is an ideal choice for applications that do not handle sensitive or sovereign data, such as the deployment of a web portal.

A private cloud, also known as "on-premise," is a cloud computing environment dedicated to a single organization: these are self-managed, on-site IT solutions. In a private cloud, all resources are isolated and under the control of a single organization, which is why it is also referred to as an internal or corporate cloud.

Organizations that choose private cloud typically manage confidential data requiring a higher level of security. This choice may also stem from a lack of internal expertise on the data platforms offered by public cloud providers, or from legacy decisions made over time.

Hybrid cloud combines the advantages of both models: it enables organizations to manage confidential data internally while leveraging the speed and performance of the public cloud for other applications (websites, client or user application deployment, etc.).

Today, this is the most widely adopted model among large enterprises and mid-sized companies worldwide.

Data breaches in the cloud most often result from misconfigured security settings or uncontrolled changes to security parameters. 

For sensitive data, it is critical to apply robust encryption protocols and strict access and key management.

Ransomware represents a major threat, paralyzing systems until a ransom is paid. It is a form of malicious software that takes data hostage: it encrypts and locks the files on your computer and demands a ransom in exchange for the decryption key. It is also important to understand that even when the ransom is paid, company data may be resold to competitors or on the dark web.

Regular backups and incident response plans are essential to protect against this type of attack. Specialized partners exist to support you on this topic.

Distributed denial-of-service (DDoS) attacks aim to make services unavailable to a company's users by overwhelming them with traffic. As a result, the site crashes or stops functioning, denying service to legitimate users and preventing legitimate traffic from reaching its destination. For e-commerce sites in particular, this causes significant revenue loss as well as increased cloud service load, and therefore higher provider bills.

Unlike on-premise environments, cloud providers offer DDoS protection that can shield against malicious traffic reaching a website or disrupting communications with web APIs, limiting the impact of the attack while allowing legitimate traffic to pass through so that operations can continue normally.

Phishing in a corporate context is a technique used to divert funds and steal sensitive information. Attackers send emails or lure individuals through fake websites: if they succeed in stealing internal credentials, they can, for example, execute transfers to fraudulent accounts.

The consequences of a successful attack are severe: financial damage, theft of sensitive data, loss of third-party trust, and more. Organizations must therefore arm themselves against fraudulent emails and fake websites. In addition to anti-phishing software, deploying an automatic fraud detection solution is strongly recommended.

User awareness training and the use of multi-factor authentication methods are also effective measures to reduce risk.

Adopting a "Security by Design" approach means integrating security from the very beginning of cloud and DevOps infrastructure development and design.

The cloud provider handles security of the cloud, but not security within the cloud. It secures its data centers and the services it makes available to organizations (including updates). However, it is the organization's responsibility to secure its use of those services and implement robust access management.

Rather than adding security measures at the end of the process, this proactive approach integrates security practices and controls from the design phase and throughout development, testing and deployment.

This includes continuous risk assessment, the use of secure-by-design principles, the implementation of strict security policies and the automation of security testing. By adopting Security by Design, developers can anticipate and mitigate vulnerabilities from the outset, building more robust and secure applications while reducing the cost and effort of fixing security flaws after the fact.

This approach also makes it easier to comply with security standards and regulations, while building user and customer trust in the security of the products and services offered.

When securing a cloud infrastructure, the primary approach is to assign and manage roles for different users, granting them only the rights they need to perform the operations they are responsible for. This method is also known as Role-Based Access Control (RBAC).

Rather than configuring access to systems or networks on a per-user basis, RBAC allows IT administrators to configure a set of permissions for different roles and then assign those roles to users based on their position and the level of access they require. Teams can easily add, modify and remove permissions for all users within a group sharing the same role, or quickly change the access level of a single user.

RBAC always works the same way:

• A user is assigned one or more roles
• Specific permissions are assigned to each role
• The user obtains those permissions when active in their assigned role
• Privileges are granted to certain users based on their assigned role and authorization

The main roles that can be assigned to users include:

• Administrators
• End users
• Guests
• Any other specialized group

RBAC is ideal for organizations looking for a scalable, easy-to-manage governance solution.

Authentication is the process of verifying that you are who you claim to be. It relies on a certificate that determines a user's identity using electronic documents called digital certificates.

A digital certificate is used to prove identity by confirming possession of a private key. Digital certificates contain:

• Identification data
• Public key information
• A digital signature derived from the certificate authority's private key, verified by its public key

For certificate-based authentication to work correctly, the user must have a private key with information that matches the public key in the certificate. Each public key is paired with a unique private key. While public keys are published, the corresponding private keys are kept secret. Data encrypted with a public key can only be decrypted with the corresponding private key.

Vault is a tool that centralizes password management (login credentials, encryption keys, passwords, tokens, etc.) for your team, and enables secure password sharing within the organization based on user privileges.

A team password manager like Vault eliminates the primary problem associated with passwords: remembering them. With Vault, users only need to remember the single master password that unlocks the password vault.

Multi-factor authentication (MFA) is an access management component that requires users to prove their identity using at least two different verification factors before accessing a tool. With MFA, if one factor is compromised, the attacker must still clear at least one additional barrier before gaining access to the target account.

MFA uses multiple technologies to authenticate a user's identity: users must combine verification technologies from at least two different authentication groups or factors. These factors fall into three categories:

• Something you know (PIN, password, security questions and answers)
• Something you have (badge, smartphone, USB key)
• Something you are (biometric fingerprints, facial or voice recognition)

These are essential for identifying vulnerabilities that could be exploited by malicious actors to compromise systems and data. They monitor for misconfigurations and coding defects.

Vulnerability scanners are automated tools that identify and create an inventory of all IT assets connected to a network. For each asset, they identify operational details such as the operating system it runs, installed software, open ports and user accounts. Vulnerability scanners can be classified into two categories:

• Web application vulnerability scanners: these analyze the application or website code to find vulnerabilities that could compromise them. They are an essential component of application security testing.
• Network application vulnerability scanners: these monitor web servers, their operating systems and any other services exposed to the internet, such as database services.

The steps a vulnerability scanning tool follows to identify flaws are:

• Misconfigurations and lack of patch management
• Scanning for security vulnerabilities across the network, workstations, servers, firewalls, etc. These must be scheduled to run automated periodic scans.
• Analyzing results to assess vulnerabilities across your networks, including historical trends and current details
• Prioritizing threats by determining their criticality and potential impact on the organization, how easily an attacker could exploit the vulnerability, whether current security controls can be reconfigured to reduce the risk of exploitation, whether vulnerabilities are false positives, and producing reports to remediate identified flaws