Linux

Common Problems 119079

Ubuntu 14.04 LTS PHP-FPM 502 Bad Gateway with Nginx

🟡 Medium   ⏱ 5–30 min  Last verified: 26 September 2020 📖 ~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 […]

Read more
Ubuntu 18.04 — ppp — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — ppp — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 26 September 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4451-1 Related CVEs: CVE-2020-15704 CVE-2020-8597 CVE-2018-11574 Upstream summary: Thomas Chauchefoin working with Trend Micro´s Zero Day Initiative, discovered that ppp incorrectly handled module loading. A local attacker could use this […]

Read more
Ubuntu 14.04 — apt — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — apt — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 26 September 2020 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4667-2 Related CVEs: CVE-2020-27350 CVE-2020-3810 CVE-2019-3462 CVE-2016-1252 CVE-2014-7206 CVE-2014-6273 CVE-2014-0487 CVE-2014-0488  +3 more Upstream summary: USN-4667-1 fixed a vulnerability in APT. This update provides the corresponding update for Ubuntu 14.04 […]

Read more
Ubuntu 14.04 — libzen — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — libzen — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 26 September 2020 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6048-1 Related CVEs: CVE-2020-36646 Upstream summary: It was discovered that ZenLib doesn't check the return value of a specific operation before using it. An attacker could use a specially crafted […]

Read more
Oracle Linux 8 — mod_auth_mellon — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — mod_auth_mellon — vulnerability — patch and remediation guide (ELSA-2019-0985)

🟠 High   ⏱ 15–60 min  Last verified: 26 September 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-0985 Related CVEs: CVE-2019-3878 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
How To Publish a Vuetify App with Nginx on Ubuntu 20.04 — step-by-step Linux tutorial on Progressive Robot

How To Publish a Vuetify App with Nginx on Ubuntu 20.04

Vuetify is a UI components library for Vue.js. Vuetify is highly configurable and customizable. You can modify the components to fit your needs, and you can set up your own theme to have a consistent component library based on your brand style. In this tutorial, you will create a TODOs app based on Vuetify from scratch and publish it using Nginx as a reverse proxy, which is required to deploy a Vue app.

Read more
How To Harden OpenSSH on Ubuntu 18.04 — step-by-step Linux tutorial on Progressive Robot

How To Harden OpenSSH on Ubuntu 18.04

Linux servers are often administered remotely using SSH by connecting to an OpenSSH server, which is the default SSH server software used within Ubuntu, Debian, CentOS, FreeBSD, and most other Linux/BSD-based systems. In this tutorial, you will harden your OpenSSH server by using different configuration options to help ensure that remote access to your server is as secure as possible.

Read more
Oracle Linux 8 — bind — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — bind — security and stability fixes — required update (ELSA-2019-3552)

🟢 Low   ⏱ 5–15 min  Last verified: 25 September 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-3552 Related CVEs: CVE-2019-6465 CVE-2018-5745 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

Read more
Common Problems 115519

RHEL 7 Docker daemon fails to start because kernel cgroup features are missing

🟠 High   ⏱ 5–30 min  Last verified: 25 September 2020 Affected versions: RHEL 7 📖 ~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 & […]

Read more
Debian 10 — davical — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — davical — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 September 2020 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-18345 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
CHAT