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Ubuntu 22.04 — knot-resolver — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — knot-resolver — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 September 2022 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6225-1 Related CVEs: CVE-2022-40188 Upstream summary: It was discovered that Knot Resolver did not correctly handle certain client options. A remote attacker could send requests to malicous domains and cause […]

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openSUSE Tumbleweed — libpixman — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libpixman — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:4148-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-44638 Upstream summary: In libpixman in Pixman before 0.42.2, there is an out-of-bounds write (aka heap-based buffer overflow) in rasterize_edges_8 due to an integer overflow […]

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How to Install and Configure Varnish Cache on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install and Configure Varnish Cache on Debian 11

Introduction How to Install and Configure Varnish Cache on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye 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 […]

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Oracle Linux 8 — java-17-openjdk — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — java-17-openjdk — security and stability fixes — required update (ELSA-2023-1898)

🟠 High   ⏱ 15–60 min  Last verified: 31 August 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-1898 Related CVEs: CVE-2023-21954 CVE-2023-21930 CVE-2023-21938 CVE-2023-21939 CVE-2023-21937 CVE-2023-21967 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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AlmaLinux 8 — sscg — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — sscg — 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-2020:1612 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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How to Set Up Kerberos KDC on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Set Up Kerberos KDC on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to set up kerberos kdc on IBM AIX 7.3 with […]

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Common Problems 120521

Debian 11 – resolv.conf Keeps Reverting and DNS Fails – Resolver Control

🟠 High   ⏱ 5–30 min  Last verified: 31 August 2022 Affected versions: Debian 11 📖 ~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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FreeBSD 13 — gnomevfs — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — gnomevfs — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 August 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: gnomevfs — unsafe URI handling Related CVEs: CVE-2004-0494 Upstream summary: Alexander Larsson reports that some versions of gnome-vfs and MidnightCommander contain a number of `extfs' scripts that do not properly […]

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