In this guide, you will configure an active-active MySQL Galera cluster with three Ubuntu 18.04 servers. Clustering adds high availability to your MySQL database by distributing changes to different servers. In the event that one of the instances fails, others are quickly available to continue serving. Galera is a database clustering solution that enables you to set up multi-master clusters using synchronous replication.
🟡 Medium ⏱ 10–30 min Last verified: 12 September 2019 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2019-3705 Related CVEs: CVE-2018-14498 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
🟠 High ⏱ 5–30 min Last verified: 11 September 2019 Affected versions: 18.04 LTS 📖 ~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 & […]
🟡 Medium ⏱ 5–30 min Last verified: 11 September 2019 📖 ~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 […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0.13.4-r0 📖 ~4 min read • Source: Alpine secdb entry — libass 0.13.4-r0 Related CVEs: CVE-2016-7969 CVE-2016-7970 CVE-2016-7971 CVE-2016-7972 Upstream summary: Alpine community repository for vedge ships libass 0.13.4-r0 which addresses CVE-2016-7969. Table of contents Symptom […]
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read • Source: Gentoo GLSA GLSA-202007-48 Related CVEs: CVE-2018-9838 Upstream summary: The caml_ba_deserialize function in byterun/bigarray.c in the standard library of OCaml has an integer overflow. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]
Memcache is a system that works to speed up virtual private servers by caching server information. The program allows you to allocate a specific amount of the server ram toward caching recently queried data for a certain amount of time. This tutorial covers Memcache installation and illustrates how to use memcache with a simple php script.
🟡 Medium ⏱ 10–30 min Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read • Source: Arch ASA ASA-201706-25 Related CVEs: CVE-2016-10369 Upstream summary: Type: access restriction bypass. Status: Fixed. Affected: 0.3.0-1. Fixed in: 0.3.0-2. Group: AVG-264. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]
Postfix is a popular open-source Mail Transfer Agent (MTA) that can be used to route and deliver email on a Linux system. It is estimated that around 25% of public mail servers on the internet run Postfix. In this guide, we’ll teach you how to get up and running quickly using the Postfix mail server.
🔴 Critical ⏱ 5–30 min Last verified: 10 September 2019 Affected versions: Debian 9 📖 ~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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