How To Set Up a Firewall Using Iptables on Ubuntu 14.04
The iptables firewall is a great way to secure your Linux server. In this guide, we’ll discuss how to configure iptables rules on an Ubuntu 14.04 server.
Ubuntu 18.04 — mailman — multiple vulnerabilities (12 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 5 September 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5180-1 Related CVEs: CVE-2021-44227 CVE-2021-43331 CVE-2021-43332 https://launchpad.net/bugs/1949401 https://launchpad.net/mailman/+bug/1949403 CVE-2021-42096 CVE-2021-42097 CVE-2020-15011 +4 more Upstream summary: It was discovered that Mailman incorrectly handled CSRF tokens. A remote list member or moderator […]
Ubuntu 20.04 — python-py — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 4 September 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5138-1 Related CVEs: CVE-2020-29651 Upstream summary: The py.path.svnwc component of py (aka python-py) through v1.9.0 contains a regular expression with an ambiguous subpattern that is susceptible to catastrophic backtracing. This […]
Ubuntu 20.04 LTS PostgreSQL Won’t Start After Crash Recovery
🟠 High ⏱ 5–30 min Last verified: 3 September 2021 Affected versions: 20.04 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 & […]
Sichern von Nginx mit Let’s Encrypt unter Ubuntu 20.04
Let´s Encrypt ist eine Zertifizierungsstelle (CA), die eine einfache Möglichkeit bietet, kostenlose TLS/SSL-Zertifikate zu erhalten und zu installieren….
Ubuntu 20.04 — nvidia-graphics-drivers-440 — multiple vulnerabilities (3 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 2 September 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-4404-1 Related CVEs: CVE-2020-5963 CVE-2020-5967 CVE-2020-5973 Upstream summary: Thomas E. Carroll discovered that the NVIDIA Cuda grpahics driver did not properly perform access control when performing IPC. An attacker could […]
Ubuntu 16.04 — usbredir — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 1 September 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5784-1 Related CVEs: CVE-2021-3700 Upstream summary: It was discovered that usbredir incorrectly handled memory when serializing large amounts of data in the case of a slow or blocked destination. An […]
Cómo proteger Nginx con Let´s Encrypt en Ubuntu 20.04
Let’s Encrypt es una entidad de certificación (CA) que proporciona una manera sencilla de obtener e instalar certificados de TLS/SSL gratuitos, lo que…
How To Use Dig, Whois, & Ping on an Ubuntu VPS to Query DNS Data
Setting up domain names can be challenging for those who are inexperienced. The “dig” command can help verify that your domain settings are correct. This is also helpful for investigating how other websites set up their domain records. This guide will introduce the basics of how to query information with dig. It will also briefly explore the “ping” and “whois” commands.
Ubuntu 14.04 LTS enters grub rescue prompt
🟡 Medium ⏱ 5–30 min Last verified: 30 August 2021 📖 ~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 […]
