Linux

Oracle Linux 8 — SDL — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — SDL — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 4 March 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-3951 Related CVEs: CVE-2019-13616 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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openSUSE Tumbleweed — libntlm0 — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libntlm0 — vulnerability — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:0806-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-17455 Upstream summary: Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a […]

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Common Problems 120991

Debian 10 – GRUB Rescue Prompt After Kernel Update – Restore Bootability

🔴 Critical   ⏱ 5–30 min  Last verified: 3 March 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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Alpine Linux edge — p11-kit — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — p11-kit — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0.23.22-r0 📖 ~4 min read  •  Source: Alpine secdb entry — p11-kit 0.23.22-r0 Related CVEs: CVE-2020-29361 CVE-2020-29362 CVE-2020-29363 Upstream summary: Alpine main repository for vedge ships p11-kit 0.23.22-r0 which addresses CVE-2020-29361. Table of contents Symptom & […]

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How to Set Up Nagios4 on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Nagios4 on Debian 10

Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up set up nagios4 on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully and the […]

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Ubuntu 16.04 — lucene-solr — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — lucene-solr — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 March 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7283-1 Related CVEs: CVE-2019-0193 CVE-2017-12629 Upstream summary: It was discovered that the Apache Solr DataImportHandler module incorrectly handled certain request parameters in a default configuration. A remote attacker could possibly […]

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openSUSE Tumbleweed — bchunk — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — bchunk — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory Related CVEs: CVE-2017-15955 CVE-2017-15953 Upstream summary: bchunk (related to BinChunker) 1.2.0 and 1.2.1 is vulnerable to an "Access violation near NULL on destination operand" and crash when processing a malformed CUE […]

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How to Configure Bridge Networking on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure Bridge Networking on RHEL 8

A Linux network bridge acts like a virtual switch, forwarding frames between connected interfaces at Layer 2. Bridges are essential when running virtual machines with QEMU/KVM or containers (Podman/Docker) that need full network access on the same subnet as the host. On RHEL 8, NetworkManager is the authoritative networking service, and nmcli is the recommended […]

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