Linux

Oracle Linux 8 — dotnet security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dotnet security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2019-1259)

🟠 High   ⏱ 15–60 min  Last verified: 20 December 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-1259 Related CVEs: CVE-2019-0820 CVE-2019-0981 CVE-2019-0757 CVE-2019-0980 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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How to Set Up CentOS Stream 9 in AWS — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up CentOS Stream 9 in AWS

Introduction This tutorial demonstrates how to Set Up CentOS Stream 9 in AWS on CentOS Stream 9. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered CentOS Stream 9 system with the default […]

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

AlmaLinux 8 — bacula — 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-2019:3504 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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Debian 11 — dump — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — dump — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 December 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2002-1914 CVE-2005-2096 Upstream summary: dump 0.4 b10 through b29 allows local users to cause a denial of service (execution prevention) by using flock() to lock the /etc/dumpdates file. […]

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How to Configure Nginx WebSocket Proxying on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure Nginx WebSocket Proxying on RHEL 7

How to Configure Nginx WebSocket Proxying on RHEL 7 WebSockets provide a full-duplex communication channel over a single TCP connection, enabling real-time features such as live chat, push notifications, collaborative editing, and live dashboards. Unlike traditional HTTP requests, a WebSocket connection is established through an HTTP upgrade handshake and then kept open indefinitely. Nginx can […]

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Debian 11 — faad2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — faad2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 20 December 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-4201 CVE-2008-5244 CVE-2017-9218 CVE-2017-9219 CVE-2017-9220 CVE-2017-9221 CVE-2017-9222 CVE-2017-9223  +12 more Upstream summary: Heap-based buffer overflow in the decodeMP4file function (frontend/main.c) in FAAD2 2.6.1 and earlier allows remote attackers […]

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Ubuntu 18.04 — tor — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — tor — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 20 December 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5036-1 Related CVEs: CVE-2019-8955 CVE-2021-28089 CVE-2021-28090 CVE-2021-34548 CVE-2021-34549 CVE-2021-34550 CVE-2021-38385 Upstream summary: It was discovered that Tor incorrectly handled certain memory operations. A remote attacker could use this issue to […]

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

AlmaLinux 8 — authd — 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-2019:1970 Upstream summary: The authd packages contain authd, a small and fast RFC 1413 ident protocol daemon with both xinetd server and interactive modes that supports IPv6 and IPv4 as well as […]

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