Linux

openSUSE Tumbleweed — dpic — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — dpic — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2021-33388 CVE-2021-33390 CVE-2021-32420 CVE-2021-32421 CVE-2021-32422 Upstream summary: dpic 2021.04.10 has a Heap Buffer Overflow in themakevar() function in dpic.y Table of contents Symptom & Impact […]

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How To Optimize Your Tomcat Installation on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Optimize Your Tomcat Installation on Ubuntu 14.04

Tomcat is a popular implementation of the Java Servlet and JavaServer Pages technologies. It is released by the Apache Software Foundation under the popular Apache open source license. Its powerful features, favorable license, and great community makes it one of the best and most preferred Java servlets.

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Ubuntu 20.04 — awl — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — awl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4539-1 Related CVEs: CVE-2020-11728 Upstream summary: Andrew Bartlett discovered that DAViCal Andrew's Web Libraries (AWL) did not properly manage session keys. An attacker could possibly use this issue to impersonate […]

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How To Install WordPress with LAMP on Debian 9 — step-by-step Linux tutorial on Progressive Robot

How To Install WordPress with LAMP on Debian 9

WordPress is the most popular CMS (content management system) on the internet. It allows you to easily set up flexible blogs and websites on top of a MariaDB backend with PHP processing. In this guide, we’ll focus on getting a WordPress instance set up on a LAMP stack (Linux, Apache, MariaDB, and PHP) on a Debian 9 server.

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How to Join RHEL 10 to Active Directory with realmd — step-by-step RHEL 10 tutorial on Progressive Robot

How to Join RHEL 10 to Active Directory with realmd

Introduction Setting up join rhel 10 to active directory with realmd on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Join RHEL 10 to Active Directory with realmd, with all the commands you need, the SELinux and firewalld considerations to keep […]

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Ubuntu 18.04 — salt — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — salt — multiple vulnerabilities (17 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6948-1 Related CVEs: CVE-2020-16846 CVE-2020-17490 CVE-2020-25592 CVE-2020-28243 CVE-2020-28972 CVE-2020-35662 CVE-2021-25281 CVE-2021-25282  +9 more Upstream summary: It was discovered that Salt incorrectly handled crafted web requests. A remote attacker could possibly […]

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Ubuntu 16.04 — mc — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — mc — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5160-1 Related CVEs: CVE-2021-36370 Upstream summary: It was discovered that Midnight Commander would not check server fingerprints when establishing an SFTP connection. If a remote attacker were able to intercept […]

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SLES 12 — stunnel — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — stunnel — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:0772-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-20230 CVE-2013-1762 CVE-2011-2940 CVE-2014-0016 CVE-2015-3644 Upstream summary: A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured […]

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AlmaLinux 8 — xorg-x11-drv-ati — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — xorg-x11-drv-ati — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALEA-2020:4742 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Oracle Linux 8 — wpa_supplicant security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — wpa_supplicant security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-1686)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1686 Related CVEs: CVE-2021-0326 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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