April 2021 - Page 51 of 66

Arch Linux — gitea — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — gitea — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202011-26 Related CVEs: CVE-2020-28991 Upstream summary: Type: insufficient validation. Status: Fixed. Affected: 1.12.5-1. Fixed in: 1.12.6-1. Group: AVG-1299. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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How to Use Ansible to Install and Set Up Docker on Ubuntu 20.04 — step-by-step Docker tutorial on Progressive Robot

How to Use Ansible to Install and Set Up Docker on Ubuntu 20.04

Docker is an application that simplifies the process of managing application processes in *containers*. This guide explains how to use Ansible to automate the steps contained in our guide on How To Install and Use Docker on Ubuntu 20.04. Ansible is a modern configuration management tool that can be used to automate the provisioning and configuration of remote systems.

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Ubuntu 20.04 — apparmor — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — apparmor — multiple vulnerabilities (2 CVEs) — 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-7035-1 Related CVEs: CVE-2016-1585 https://bugs.launchpad.net/apparmor/+bug/1597017 Upstream summary: It was discovered that the AppArmor policy compiler incorrectly generated looser restrictions than expected for rules allowing mount operations. A local attacker could […]

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How to Configure VLAN Tagging with 802.1Q on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure VLAN Tagging with 802.1Q on RHEL 8

IEEE 802.1Q VLAN tagging allows a single physical network interface to carry traffic for multiple logically isolated networks by inserting a 4-byte VLAN tag into Ethernet frames. This is essential in virtualization environments, network segmentation architectures, and anywhere a single uplink must serve multiple subnets. On RHEL 8, NetworkManager handles 802.1Q VLAN interfaces natively through […]

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

AlmaLinux 8 — gdb — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:1828 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 — nss and nspr security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — nss and nspr security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2019-1951)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-1951 Related CVEs: CVE-2018-18508 CVE-2019-11719 CVE-2019-11727 CVE-2019-11729 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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Amazon Linux 2 — libzapojit — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — libzapojit — multiple vulnerabilities (2 CVEs) — 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 ALAS2-2023-2144 Related CVEs: CVE-2016-20011 CVE-2021-39360 Upstream summary: In GNOME libzapojit through 0.0.3, zpj-skydrive.c does not enable TLS certificate verification on the SoupSessionSync objects it creates, leaving users vulnerable to network […]

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Common Problems 118012

GRUB Rescue Prompt After Disk Layout Change

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 📖 ~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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