BLOG ESPECIALIZADO NO MUNDO LINUX. Blog de Linux com vídeo aulas, notícias do mundo Linux e do Software Livre.
Vulnerabilidade no Postfix pode derrubar seu servidor de e-mail. Guia prático para Ubuntu: veja se está vulnerável, aplique correção com script, mitigue com iptables/AppArmor e evite o próximo ataque. Inclui recomendações de livro afiliado para aprofundamento.
Aprenda a identificar, corrigir e prevenir vulnerabilidades em pacotes Ubuntu usando o caso real do Robocode (USN-8385-1). Guia completo com comandos de verificação, script de automação para correção, mitigações com UFW e AppArmor, e dois livros recomendados para dominar a segurança em servidores Linux. Conteúdo prático para administradores e entusiastas.
Vulnerabilidade crítica CVE-2023-51766 no Exim permite contrabando SMTP e forjamento de e-mails. Aprenda a verificar, corrigir com script automático e aplicar mitigação temporária no Ubuntu. Proteja seu servidor agora mesmo com este guia prático definitivo.
Descubra se seu servidor Apache Tomcat está vulnerável às falhas críticas de bypass de autenticação e autorização (CVE-2026-43512, CVE-2026-43513, CVE-2026-43515). Comandos reais para Ubuntu, script de correção automática, mitigações com iptables e recomendação de leitura para aprofundar a segurança. Atualize agora e proteja seus dados!
Patched but still worried about CVE-2026-31431 (Copy Fail)? This guide explains the algif_aead bug, shows how to test your Ubuntu systems with concrete commands, provides a production-ready bash automation script, and offers AppArmor/iptables alternatives.
Stay safe for years with this canonical, high‑value resource.
Stop worrying about image injection attacks. Learn to check, fix, and automate OpenStack Glance vulnerability mitigation on Ubuntu with real commands, scripts, and workarounds.
Stop DoS attacks via media plugins. Learn to check, patch, and automate GStreamer security on Ubuntu. Includes bash scripts + firewall mitigation.
Urgent security update: Critical LibTIFF DoS vulnerabilities (CVE-2025-61143, CVE-2025-61144) affect multiple Ubuntu releases. Learn about the memory corruption flaws, impact on systems from 14.04 LTS to 25.10, and get the precise package versions for a complete remediation. Patch your Linux environment now to prevent image processing crashes and ensure service continuity.
The critical USN-8018-3 Python 2.7 security update for Ubuntu 22.04, 20.04, and 18.04 LTS patches severe HTTP header injection (CVE-2026-0865) and denial-of-service vulnerabilities. This expert analysis covers patch details, risks for legacy systems, and mitigation strategies for Ubuntu Pro users.
Urgent: Ubuntu 16.04 LTS Linux kernel security update USN-8070-1 patches 9 high-severity vulnerabilities (CVE-2021-47599 to CVE-2025-40215). This critical advisory covers AWS, KVM, and generic images, addressing flaws in networking, filesystems (BTRFS), and drivers. Learn about the mandatory ABI change, affected subsystems, and step-by-step remediation to secure your legacy systems against active compromise. Expert analysis inside.
Urgent: Canonical releases USN-8062-2, a critical security update for cURL addressing 9+ high-impact vulnerabilities (CVEs) in Ubuntu 14.04-20.04 LTS. This patch mitigates risks including credential leakage via Oauth2 redirects, TLS verification bypass, and proxy cache poisoning. Learn how these exploits affect your EOL (End-of-Life) systems and the exact commands to secure your infrastructure with Ubuntu Pro's extended security maintenance (ESM).
A high-severity Intel microcode flaw (CVE-2025-31648) exposes Ubuntu systems to privilege escalation. Discovered by researcher Sergiu Ghetie, this vulnerability allows local authenticated users to execute arbitrary code with administrative privileges. Get the complete technical analysis, official CVSS score breakdown, and step-by-step patching instructions for all affected Ubuntu LTS releases, including 24.04, 22.04, and legacy versions requiring Ubuntu Pro. Critical update requires immediate reboot.
A new Ubuntu security notice (USN-8067-1) reveals a critical CSRF bypass flaw in Mailman versions 2.1. This vulnerability allows remote attackers to hijack admin credentials. Learn about the patch for Ubuntu 20.04 and 16.04, mitigation strategies, and how Ubuntu Pro offers a seamless fix for this high-severity threat.
Critical GIMP vulnerabilities (USN-8057-1) impact Ubuntu 16.04-24.04 LTS. Attackers can execute arbitrary code via FLI, DCM, JP2, and PSP files. Update immediately with Ubuntu Pro to mitigate CVE-2025-2761, CVE-2025-10922, and more. Essential reading for Linux security administrators.
Critical Ubuntu 22.04 LTS DjVuLibre updates address severe DoS vulnerabilities (CVE-2021-46312, CVE-2025-53367). Learn how to patch against remote code execution & system crashes to maintain infrastructure integrity. Expert remediation guide included.
A critical Ubuntu security advisory (USN-8023-1) exposes libxmltok/Expat to CVE-2026-24515 and CVE-2026-25210, enabling XML denial of service and potential RCE. This deep technical analysis covers mitigation strategies, Ubuntu Pro patch management, and advanced memory safety hardening for LTS environments. Essential reading for DevSecOps and compliance teams.
The Ubuntu 8022-1 security advisory exposes critical Expat XML parser vulnerabilities (CVE-2025-59375, CVE-2026-25210) affecting EOL systems. This comprehensive guide details enterprise patch management strategies, Ubuntu Pro rollouts, and mitigation tactics against memory corruption and RCE threats to maintain infrastructure compliance and operational continuity.
Critical CVE-2026-23876 vulnerability in ImageMagick allows remote code execution & denial-of-service on Ubuntu 14.04-24.04 LTS. Our comprehensive guide provides patching instructions, exploit analysis, and Ubuntu Pro mitigation steps. Secure your Linux servers now.
