Overly broad permissions can turn one compromised account into a much larger security problem. Learn how to reduce unnecessary access, review privileges, and apply least privilege across modern Linux systems. Review Linux Privileges×
Desktop Security
security advisory vulnerability
security advisory vulnerability GNOME is officially shortening its standard vulnerability disclosure window from 90 days to 30 days, a change that impacts upstream maintainers, downstream Linux distributions, and system administrators in how they handle software vulnerabilities. The policy shift, announced by long-time security coordinator Michael Catanzaro , addresses modern software patching realities and a growing influx of automated submissions. . Because GNOME is the default desktop environment on several major Linux...
Jul 21, 2026
Security Vulnerabilities security advisory moderate
security advisory moderate For organizations that run a self-hosted Git platform, it’s no longer just about hosting static code repositories. Today, Git servers are responsible for deployment pipelines, API tokens, SSH keys, package repositories, and the automation scripts that push code directly. Confirm that the upgrade addresses known vulnerabilities but also provides production environments. . That makes them trusted systems within the development environment and attractive targets for attackers looking to move...
Jul 20, 2026
Server Securitydata privacy automation
data privacy automation Every system admin has lived through the same Monday morning ritual. A queue of forty tickets, half of them password resets, permission errors, or disk space warnings that any experienced technician could resolve in under two minutes. The other half require actual judgment. For years, automation promised that software would eventually sort the two apart on its own. That promise is now being tested in production Linux environments. . Early results are reshaping how IT teams think about tier-1...
Jul 17, 2026
Privacydata collection automation
data collection automation You're running a web scraping project to collect pricing data from e-commerce sites. You set up a pool of datacenter proxies, launch your scripts, and within minutes — banned . CAPTCHAs everywhere. Your data pipeline stops before it really begins. . It's a frustrating scenario that plays out daily in ad verification, market research, and multi-account management. The website doesn't know you're doing legitimate research or monitoring. It just sees traffic coming from IP ranges it recognizes as...
Jul 17, 2026
Security Trends security advisory social engineering
security advisory social engineering Business Email Compromise used to be a numbers game — mass-blasted emails, broken English, an obvious "URGENT WIRE TRANSFER" subject line. That era is over. Generative AI has turned BEC into a tailored, low-noise operation that mimics writing style, voice, and even video presence. This piece looks at what's actually changed under the hood, what defenders are testing in response, and why so many organizations are still structurally unprepared for it. . The Infrastructure Problem Nobody Wants to...
Jul 17, 2026
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77
security advisorypatch managementsecure codingEvaluating Linux Security Expertise in Software Development Partners
From enterprise servers to cloud-native applications, Linux is the backbone of numerous information systems. Its reliability and adaptability have allowed enterprises and developers to prefer and continue to prefer Linux as an operating system. In addition, the growing reliance on open-source components and infrastructure makes a competent security system for Linux crucial today. . Whether working with in-house teams or software outsourcing companies, the right partner is knowledgeable and skilled enough to mitigate exposure to vulnerabilities, safeguard sensitive information, and guarantee enduring software integrity. Today, many software development outsourcing companies position themselves as full-cycle development providers, but only a few possess the depth of expertise required to build secure, Linux-based systems . A qualified partner will minimize vulnerabilities, protect sensitive data, and deliver long-term software resilience. Importance of Expertise in Open Source Security for Custom Software Development Modern development depends on open-source software. Web servers such as Apache and Nginx , as well as container orchestration software such as Kubernetes , are part of modern-day infrastructure. For all its potential for greater efficiency, innovation, and openness, this approach also brings new risks to security. Since source code is modifiable without restriction, attackers can identify weaknesses and exploit them. Hence, developers must remain proactive in terms of security patching, vulnerability scans, and dependency management. Why Expertise Matters A development company with extensive Linux and open source security knowledge can successfully mitigate these risks. Such a company is most likely to: Be current with the latest Common Vulnerabilities and Exposures (CVEs) . Employ open-source libraries that are secure and free of outdated or deprecated versions. Adhere to defensible application architecture during application development. Tipsfor Evaluating a Company’s Expertise Review their portfolio: Does it mention any work done using Linux environments? Request descriptions of specific pieces of Linux software they have developed. Inquire about their contributions to open source. Companies that contribute to open source projects usually demonstrate a higher level of comprehension of the ecosystem. Assess the strategic management of the project: Are there Linux-certified engineers or security experts on the team? Examine their documentation processes: Well-organized documentation is usually a hallmark of well-organized and security-aware development teams. Key Security Practices for Developing Secure Applications on Linux A reliable development company should implement best-in-class security practices throughout the software lifecycle. Here are several that are particularly relevant for Linux-based environments: 1. Secure Coding Standards Secure coding is non-negotiable. Follow OWASP 's guidelines for secure coding and prevent the use of hardcoded credentials. Implement input validation to mitigate injection attacks. Advice for Linux admins : Ask whether the company uses tools like cppcheck, Clang Static Analyzer, or Flawfinder to analyze code security during development. 2. Regular Security Audits Self-managed or outsourced internal peer audits identify and assess risks and vulnerabilities by discreetly evaluating the system’s security posture. These audits should assess server file access controls, peripheral file access restrictions, and access privileges. What to check : Inquire if they run Linux-based tools like Lynis or OpenVAS for auditing systems and applications. 3. Patch Management Regular, timely updates to the operating system and open source dependencies are critical. Attackers actively use exploitable, outdated software as a primary entry point. Best practice : Ensure the company has automated patching workflows for critical Linux components,especially when using distributions like Ubuntu, CentOS, or Debian . 4. Compliance with Security Standards Observing policies like ISO/IEC 27001 , GDPR , or SOC 2 indicates that a company has well-established, comprehensive security policies and controls. Due diligence tip : Ask whether they follow compliance frameworks and how they handle data encryption, access logs, and secure storage on Linux servers. 5. Role-Based Access Control (RBAC) The privileges escalation and separation policy must be sufficiently granular, as a clear separation of privileges significantly reduces internal threats. Linux perspective : Confirm that they configure sudo policies and user permissions according to least privilege principles. The Role of DevOps and Continuous Security in Linux-Based Software Projects Security in every stage of the development process is now mandatory—that's where DevSecOps begins. It brings security governance to the DevOps process so day-to-day operations do not detract from security. Why DevSecOps Matters for Linux Projects Linux servers are usually the core part of CI/CD pipelines . The lack of ongoing security means every update not followed by a security measure could create a security loophole. Key benefits include: Automated testing for vulnerabilities using tools like Trivy or Aqua Security Continuous monitoring of logs and system behavior with Auditd, OSSEC, or ELK stacks Secure CI/CD pipelines are configured with proper access restrictions, code signing, and environment isolation. Questions to Ask Your Development Partner What tools do you use for vulnerability scanning in the CI/CD pipeline? How do you ensure that your build servers (often Linux-based) remain secure? Do you use Infrastructure as Code (IaC) security checks (e.g., Terraform, Ansible, Chef)? What policies are in place around secret management in pipeline environments? Conclusion: Secure Your Linux Stack Whenselecting a software development company, the decision relies heavily on the confidence placed in the partner to manage and secure the systems, data, and users effectively—cost and portfolio visuals are secondary. To recap: Open-source environments alongside Linux offer unrivaled flexibility but lack defense resources. A competent development company performs secure code implantation, audits, patching, and sustained compliance. DevSecOps forms the backbone infrastructure for security implementation within CI/CD pipelines on Linux systems. The Linux administrator overseeing a development partner selection should thoroughly scrutinize these considerations and guide questioning regarding technical components, including tools, practices, and standards related to compliance. Ask the right questions, investigate technical capabilities, and evaluate the company’s commitment to open source and Linux security. Your project’s future may depend on it. . To ensure application safety, choose programmers proficient in Linux security protocols and open-source methodologies to minimize vulnerabilities efficiently.. Linux security expertise, open source development, secure application practices. . MaK Ulac
Apr 10, 2025
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Server Security
77
security advisorynetwork protectiondata encryptionEssential Linux Security Tips: Best Practices for a Resilient System
Linux is a powerful operating system that is greatly appreciated for being reliable, flexible, and open in nature. It runs servers, desktops, and even embedded devices around the world. But this huge popularity comes with big risks too, as Linux-based systems are not really safe from security hazards. Thus, implementing Linux security best practices effectively secures your infrastructure against security vulnerabilities, data breaches, and data loss. . The most effective way of implementing security is embedding it into a secure software product development life cycle . Of course, different phases of the SDLC—from planning to deployment and maintenance—may have their share of intervention. You may mitigate the risks associated with well-planned possible vulnerabilities or impose secure code on your application development to strengthen your application base. You may notice in a well-implemented SDLC that those places have embedded security to make early control of risks possible. This detailed white paper highlights imperative Linux security best practices to protect your open-source environment. Keep Your System Updated System updates are one of those core aspects of security that tends to get overlooked. Updates patch vulnerabilities currently being exploited by attackers. Delays in updating expose your system to risk unnecessarily, even when your configuration appears secure. Real-World Example: A vulnerability in the Linux kernel , CVE-2021-3156, provided privilege escalation in 2021. Exposure was mitigated for those users who managed to apply an update in good time, yet there are still unpatched systems out there ready to be exploited. How to Stay Updated: Apply critical patches using automated scripts like unattended-upgrades to ensure timely application of patches. Fetch the latest packages from a package manager such as apt, yum, or dnf. Go through changelogs of key pieces of software for possible security implications. Bear it in mind that sometimeseven tiny changes can have important security consequences. Use the Principle of Least Privilege Principle of Least Privilege restricts the potential damage that can be done by an account or process in case it gets hacked: minimize the amount of permissions granted to reduce the possibility of unauthorized access to sensitive information. Practical Steps: Allow no root logins for administration and use sudo instead. Set file permissions using the utilities chmod, chown, or setfacl. A sensitive configuration file, for example, may require only chmod 600. Minimize set user ID programs that grant processes privileges they don't really need to carry out their functions through the implementation of strict access control policies utilizing SELinux or AppArmor. Enhance Authentication The authentication procedure is the first entry point into your Linux boxes. Weak password policies, password reuse, or badly implemented mechanisms will let them in. Advanced Practices: Enforce password policy, for example, pam_pwquality, and it should contain a minimum length, enforcement of special characters in passwords, and password expiration. Two-factor authentication using Google Authenticator or Duo Security adds another layer of security. Switch to key-based authentication instead of passwords for remote logins. Keep your private key in a safe place. Firewalls and Network Security Firewall and intrusion detection systems are the first layer of defense that keeps bad people and scripts away from your systems. Linux has superb tools to tune up network security policies. Enhancing Network Security: Firewall: either use fine-grained control of iptables or the ease of use of ufw. Example: ufw deny 22 bans SSH on port 22. IDS: Install Snort or Suricata and detect bad traffic patterns. Use Wireshark and tcpdump to monitor network flows in real-time to detect abnormalities. Encrypt Data at Rest and in Transit Encryption is an absolutemust for locking up your sensitive data from unauthorized access both on the disk and over the networks for integrity and to ensure confidentiality. Encryption Tools: LUKS can be used to achieve full-disk encryption of the local storage. Encrypt/decrypt sensitive files with GPG . Enable HTTPS on your websites using the Let’s Encrypt tool among others to make sure that the ciphers used are safe in SSH connections. Real-World Use Case: Most financial institutions encrypt data at rest and in transit to meet the compliances of GDPR and PCI DSS. Hence, security and compliance because of encryption go hand in glove. Monitor Logs and System Activity System logs may stand useful in revealing unauthorized activities, misconfigurations, or intrusion attempts. Periodic log monitoring ensures early detection of threats before any exploit causes damage. Log Management: Centralize your logs at a single location for better management by making use of Rsyslog and Journald. Establish an alerting mechanism for malicious activities like repeated failed login attempts, privilege escalation, and so on. Automate your log analysis using Elk Stack, Splunk, and Logwatch to expedite identifying anomalies. Secure the Kernel The kernel itself forms the heart of the Linux Operating System; hence, the moment that is compromised, the security of the whole system is spoilt. Securing the Kernel : Keep the kernel updated to patch existing bugs. With kexec, one can remotely reboot to newer kernels without disrupting the currently running programs. Turn off unused kernel modules, reducing the attack surface area. For example, if one does not use USB devices, turn off all USB-related modules with the command modprobe -r. Utilize some kernel hardening with security features like Grsecurity or AppArmor. Regular Backups Data loss could be caused by a ransomware attack, hardware failure, or human error. Doing regular backups means one can recoverimmediately should anything happen. Types of Backups: Automate your backups with rsync, Borg, or Duplicity. Store your backups in an offsite location or in safe cloud environments, so when physical disasters strike, one is safe. Test the restoration processes every now and then to be sure that one will really be able to rely on their system backup. Leverage Open Source Security Tools Linux has a very lively community of free, open-source security tools that are capable of carrying out all kinds of tasks related to securing your system. The Must-Haves: Lynis: a tool for deep system auditing that lets one know of the weaknesses in security. Fail2Ban: guards against brute-force attacks, banning suspicious IP addresses. ClamAV: provides malware scanning for the detection and cleaning up of malicious files. Educate and Train Your Team Security awareness is a very important but often overlooked aspect of system security. Human mistakes are among the most common causes for breaches; thus, education is key. Some Tips for Training: Have periodic workshops or training classes on best practices for Linux security. Conduct training on fresh threats, such as new malware that targets Linux. Prepare a plan for incident response in which every member of your team will know how to act in case a security breach happens. Sandboxing and Isolation Techniques Sandboxing segregates applications; hence, if an attacker compromises one application, this will not affect the whole system. In the Case of Sandboxing, Use: Docker: For complete segregation of an application, including all dependencies for the application, use containerization. Firejail: In case of application-level sandboxing, minimum configuration. Virtual Machines: Run untrusted code on Virtual Machines for better segregation. Regular Security Audits Regular security audits point out vulnerabilities and ascertain whether they achieve organizational orregulatory standards. Steps to Audit: Run vulnerability scans using OpenVAS or Nessus. Perform penetration testing to see how systems defend themselves during an attack. Find configuration files maintaining a set of various misconfigurations that may expose your system to predators. Conclusion: Building a Secure Linux Ecosystem Securing your Linux environment involves active participation in its security—a multilayered approach. That means best practices related to Linux security will be included in the software product development life cycle, and hence, it would be a continuum rather than an afterthought. From the least privilege principle to encryption, log monitoring, and Linux security-awareness training, these ensure a robust guard against existing cyber threats for a Linux ecosystem. Not only will a secure Linux environment make it a matter of data security, but it is also about system reliability, compliance, and peace of mind for your team and stakeholders. . Implement essential Linux security protocols to safeguard your machine against unauthorized access and ensure the preservation of data integrity and regulatory compliance.. Linux security best practices, secure Linux environment, open-source security tools, effective security strategies. . Dave Wreski
Jan 12, 2025
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Server Security
214
secure codingembedded systemsapplication developmentUtilizing Rust Language for Secure IoT Applications on Azure Sphere
The hope? To grease the security skids for internet-connected devices – and they need all the help they can get. . Developers can now use the Rust programming language when creating applications on Azure Sphere platform for internet-connected devices. Programmers can apply the performance and security capabilities within Rust to make software for Internet of Things devices and other embedded systems that can be the target of botnets and other malware. "Rust and Azure Sphere are a good match – a programming language that can improve safety of code with strict compile time safety checks alongside Azure Sphere's secure identity, update, and end-to-end encrypted communication services for internet-connected devices should provide greater security to the customer applications," Akshatha Udayashankar, an embedded software engineer at Microsoft, wrote in a blog post this week. . Programmers may leverage Rust for creating software on Azure Sphere, enhancing both safety and efficiency.. Azure Sphere, Rust Programming, IoT Security, Embedded Development. . Brittany Day
Jan 16, 2023
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IoT Security
209
cybersecuritysoftware developmentsecure codingExploring Rust's Role in Strengthening Software Security
Rust makes it impossible to introduce some of the most common security vulnerabilities. And its adoption can’t come soon enough. . Whether you run it for a massive organization or simply own a smartphone, you're intimately familiar with the unending stream of software updates that constantly need to be installed because of bugs and security vulnerabilities. People make mistakes, so code is inevitably going to contain mistakes—you get it. But a growing movement to write software in a language called Rust is gaining momentum because the code is goof-proof in an important way. By design, developers can't accidentally create the most common types of exploitable security vulnerabilities when they're coding in Rust, a distinction that could make a huge difference in the daily patch parade and ultimately the world's baseline cybersecurity. . Uncover the ways Rust addresses prevalent security vulnerabilities in code, boosting cyber protection for every user.. Secure Programming,Rust Language,Cybersecurity Practices. . Brittany Day
Jan 15, 2023
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Security Trends
209
security practicesopen sourcesoftware developmentImportance of Teaching Secure Software Development Practices
Addressing a decades-old deficiency in coding curriculums could have a profound effect on the security of the software supply chain, a leading expert on the subject tells The Daily Swig . . In particular, David A Wheeler, director of open source supply chain security at the Linux Foundation, draws a link between a failure to incorporate security into entry-level developer courses and the vast majority of vulnerabilities belonging to a small number of common bug classes. The IT PhD and Certified Information Systems Security Professional (CISSP) also moonlights as adjunct professor of computer science at Virginia’s George Mason University, and in 2020 concluded a 33-year spell at the US Institute for Defense Analyses. . Focusing on cybersecurity within programming education may strengthen the integrity of software supply chains, asserts David A. Wheeler.. Secure Coding Practices, Software Supply Chain, Developer Education, Open Source Security. . Brittany Day
Dec 14, 2022
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Security Trends
82
security advisorybuffer overflowmemory safetyNSA Cybersecurity Directive: Avoid C and C++ to Enhance Safety
The C and C++ languages are unsafe. Instead, the U.S. National Security Agency would like devs to use memory-safe languages—because most security vulnerabilities are caused by bugs in memory usage. . Neal Ziring, the NSA Cybersecurity Directorate director, says all you programmers are making “simple mistakes” that are “still entirely too common.” He’s talking about problems such as buffer overflows and use-after-free bugs. His prescription: Switch to languages such as Rust , like some of the Linux kernel team are doing. The link for this article located at Security Boulevard is no longer available. . NSA recommends steering clear of C and C++ for development, highlighting memory vulnerabilities, and suggests opting for safer programming languages to bolster security measures.. Memory Safety Practices, Secure Coding Guidelines, Cybersecurity Recommendations. . Brittany Day
Nov 27, 2022
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Government
78
security advisoryzero-daybrowser securityFirefox 95: Introducing RLBox Sandboxing For Enhanced Browser Security
Mozilla has released Firefox 95 for Linux, Windows and MacOS, which features a new security sandboxing technology called RLBox that uses WebAssembly to isolate potentially buggy code. . The sandboxing technology was co-developed by researchers at Mozilla, the University of California, San Diego, the University of Texas, Austin, and Stanford University. Mozilla released a preview of its for Firefox on Linux and macOS last December and has now extended it to Firefox for Windows, iOS and Android, according to Mozilla. RLBox works by separating third-party libraries from an app's native code. The first modules it isolates are Graphite , Hunspell , Ogg , Expat and Woff2 , with RLBox protecting Firefox against attacks on vulnerabilities in these libraries. . Firefox 95 introduces RLBox, enhancing user safety by sandboxing risky components, isolating bugs from external libraries and maintaining browser integrity.. Firefox RLBox, Sandboxing Technology, Web Security. . LinuxSecurity.com Team
Dec 08, 2021
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Vendors/Products
79
Linux improvementssecurity featuresecure codingLinux 5.6 New GRND_INSECURE Option Improves Random Data Generation
The recent work by longtime kernel developer Andy Lutomirski on improving Linux's random APIs and introducing a new "GRND_INSECURE" option is now queued into the random dev queue ahead of the Linux 5.6 cycle. Learn more: . These changes to the random number generation add a new GRND_INSECURE flag for getentropy() and removes the blocking pool (though /dev/random can still block after the system has booted). These changes provide for some code cleanups and GRND_INSECURE allows returning potentially "insecure" random data. Depending upon the system state, GRND_INSECURE output may not meet the standards for being cryptographically random but is enough for the kernel providing the best random output it can when requested. GRND_INSECURE is sufficient for "best-effort non-cryptographic bytes" when users may not necessarily need strong random output. The link for this article located at Phoronix is no longer available. . New GRND_INSECURE flag introduced in Linux 5.6 enhances random data generation options for users needing less secure outputs.. recent, longtime, kernel, developer, lutomirski, improving, linux', random. . LinuxSecurity.com Team
Jan 08, 2020
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