O Apache Tomcat é um servidor web e um servlet container que é usado para servir aplicações Java. O Tomcat é uma implementação open source das tecnologias Java Servlet e JavaServer Pages, lançada pela Apache Software Foundation. Este tutorial aborda a instalação básica e algumas…
🟢 Low ⏱ 5–15 min Last verified: 15 July 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read • Source: Debian Security Tracker Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan […]
🟢 Low ⏱ 5–15 min Last verified: 15 July 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7759-1 Related CVEs: CVE-2019-6473 Upstream summary: It was discovered that Kea DHCP did not correctly handle invalid hostnames. A remote attacker could possibly use this issue to cause a denial […]
Introduction How to Configure ACLs on Ext4 File Systems on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from […]
Port knocking is a method of hiding services behind a firewall until a specific sequence of network activity occurs. After detecting this, the firewall is dynamically reconfigured to expose the requested service for the client who completed the specific sequence of activity. In this article, we will discuss how to implement a port knocking mechanism on an Ubuntu VPS using only the tools available within the iptables package.
🟢 Low ⏱ 5–15 min Last verified: 15 July 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read • Source: Ubuntu Security Notice USN-4001-1 Related CVEs: CVE-2019-9893 Upstream summary: Jann Horn discovered that libseccomp did not correctly generate 64-bit syscall argument comparisons with arithmetic operators (LT, GT, LE, GE). An attacker could use […]
🟠 High ⏱ 15–60 min Last verified: 15 July 2020 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2020-5848 Related CVEs: CVE-2020-16166 CVE-2020-24394 CVE-2020-10751 CVE-2020-12771 CVE-2020-14331 CVE-2020-10781 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]
Introduction How to Install Kotlin on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 10. This tutorial […]
🟢 Low ⏱ 5–15 min Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read • Source: SUSE advisory openSUSE-SU-2019:2131-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-11324 Upstream summary: The urllib3 library before 1.24.2 for Python mishandles certain cases where the desired set of CA certificates is different from the OS […]
🟠 High ⏱ 5–30 min Last verified: 14 July 2020 Affected versions: Debian 10 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & […]
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