Package Management

Amazon Linux 2 — apr-util — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — apr-util — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2023-1937 Related CVEs: CVE-2022-25147 Upstream summary: 2023-05-23: The severity level was changed from Critical to Medium. Integer Overflow or Wraparound vulnerability in apr_base64 functions of Apache Portable Runtime Utility (APR-util) […]

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Debian 11 — golang-1.15 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — golang-1.15 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 19 April 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-15586 CVE-2020-16845 CVE-2020-24553 CVE-2020-28362 CVE-2020-28366 CVE-2020-28367 CVE-2020-29509 CVE-2020-29510  +12 more Upstream summary: Go before 1.13.13 and 1.14.x before 1.14.5 has a data race in some net/http servers, as […]

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How to Configure BGP Routing with BIRD on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure BGP Routing with BIRD on RHEL 8

Border Gateway Protocol (BGP) is the routing protocol that powers the internet, exchanging routing information between autonomous systems (AS). On RHEL 8, the BIRD Internet Routing Daemon provides a lightweight, production-grade BGP implementation available through the EPEL repository. This tutorial walks through installing BIRD, writing a BGP configuration with neighbor relationships and route filters, verifying […]

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Oracle Linux 8 — virt:ol and virt-devel:rhel security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — virt:ol and virt-devel:rhel security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2020-4676)

🟡 Medium   ⏱ 10–30 min  Last verified: 18 April 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4676 Related CVEs: CVE-2019-15890 CVE-2019-20485 CVE-2020-10703 CVE-2020-14301 CVE-2020-14339 CVE-2020-1983 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How to Set Up Puppet Agent on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up Puppet Agent on CentOS Stream 9

Introduction How to Set Up Puppet Agent on CentOS Stream 9 on CentOS Stream 9 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration […]

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AlmaLinux 8 — qt5-qtdeclarative — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — qt5-qtdeclarative — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:4172 Related CVEs: CVE-2021-3481 CVE-2018-19869 CVE-2018-19871 CVE-2018-19872 Upstream summary: Qt is a software toolkit for developing applications. The following packages have been upgraded to a later upstream version: adwaita-qt (1.2.1), python-qt5 (5.15.0), […]

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IBM AIX 7.3 — CVE-2000-1120 — buffer overflow — patch and remediation guide — diagnosis and fix on IBM AIX 7.3

IBM AIX 7.3 — CVE-2000-1120 — buffer overflow — patch and remediation guide

🟠 High   ⏱ 30–90 min  Last verified: 18 April 2022 Affected versions: IBM AIX 7.3 📖 ~4 min read  •  Source: NVD CVE-2000-1120, IBM Support Bulletin CVE: CVE-2000-1120 NVD summary: Buffer overflow in digest command in IBM AIX 4.3.x and earlier allows local users to execute arbitrary commands. References: marc.info/?l=bugtraq&m=97569466809056&w=2   www-1.ibm.com/support/search.wss?rs=0&q=IY08143&   www-1.ibm.com/support/search.wss?rs=0&q=IY08287& […]

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FreeBSD 13 — py311-httpx — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py311-httpx — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 April 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-httpx — input validation vulnerability Related CVEs: CVE-2021-41945 Upstream summary: lebr0nli reports: Encode OSS httpx <=1.0.0.beta0 is affected by improper input validation in `httpx.URL`, `httpx.Client` and some functions using `httpx.URL.copy_with`. […]

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How to Install kubeadm and Set Up a Kubernetes Cluster on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install kubeadm and Set Up a Kubernetes Cluster on Debian 11

Introduction This guide explains how to Install kubeadm and Set Up a Kubernetes Cluster on Debian 11 on Debian 11 Bullseye. Debian Bullseye uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian […]

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Common Problems 115391

YUM Metadata Cache Corruption on RHEL 7

🟡 Medium   ⏱ 5–30 min  Last verified: 18 April 2022 📖 ~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 & Cross-Refs References & Further […]

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