Security Hardening

Debian 11 — ruby-devise — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — ruby-devise — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 24 July 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-0233 CVE-2015-8314 CVE-2019-5421 CVE-2026-32700 CVE-2026-40295 Upstream summary: Devise gem 2.2.x before 2.2.3, 2.1.x before 2.1.3, 2.0.x before 2.0.5, and 1.5.x before 1.5.4 for Ruby, when using certain databases, […]

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Ubuntu 18.04 — python3.8 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — python3.8 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 24 July 2026 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8018-2 Related CVEs: CVE-2025-15367 CVE-2025-15366 CVE-2026-0865 https://bugs.launchpad.net/bugs/2143706 CVE-2025-15282 CVE-2026-0672 CVE-2025-13837 CVE-2025-11468  +12 more Upstream summary: USN-8018-1 fixed vulnerabilities in python3. That update introduced regressions. The patches for CVE-2025-15366 and CVE-2025-15367 […]

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Red Hat Enterprise Linux 9 — libvpx — vulnerability — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 9

Red Hat Enterprise Linux 9 — libvpx — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 9 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:5326 Related CVEs: CVE-2026-2447 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Common Problems 114134

RHEL 10 – journald Disk Usage Explodes and Fills Root FS – Log Retention Controls

🟠 High   ⏱ 5–30 min  Last verified: 24 July 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 […]

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Ubuntu 24.04 — squid — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — squid — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 24 July 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8157-1 Related CVEs: CVE-2026-33526 CVE-2026-33515 CVE-2026-32748 CVE-2025-62168 CVE-2025-59362 CVE-2024-37894 Upstream summary: It was discovered that Squid incorrectly handled certain ICP traffic. In environments where ICP support is enabled, a remote […]

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Red Hat Enterprise Linux 9 — openssh — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 9

Red Hat Enterprise Linux 9 — openssh — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 9 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:19219 Related CVEs: CVE-2026-35385 CVE-2026-35386 CVE-2026-35387 CVE-2026-35388 CVE-2026-35414 CVE-2026-3497 CVE-2025-61984 CVE-2025-61985  +1 more Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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Ubuntu 24.04 — php-league-commonmark — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — php-league-commonmark — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 24 July 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8194-1 Related CVEs: CVE-2026-33347 CVE-2025-46734 CVE-2026-30838 Upstream summary: It was discovered that league/commonmark did not properly restrict unsafe attributes when the Attributes extension was enabled. An attacker could possibly use […]

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How to Configure Nginx as a Reverse Proxy for Apache2 on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Configure Nginx as a Reverse Proxy for Apache2 on FreeBSD 15

Introduction This guide explains how to Configure Nginx as a Reverse Proxy for Apache2 on FreeBSD 15 on FreeBSD 15. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework […]

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Ubuntu 24.04 — openjdk-lts — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — openjdk-lts — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 24 July 2026 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8001-1 Related CVEs: CVE-2026-21933 CVE-2026-21932 CVE-2026-21945 CVE-2026-21925 CVE-2025-53066 CVE-2025-53057 CVE-2025-30761 CVE-2025-30754  +12 more Upstream summary: It was discovered that the RMI component of OpenJDK 11 would establish RMI TCP endpoint […]

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Ubuntu 20.04 — python-tornado — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — python-tornado — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 24 July 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8198-1 Related CVEs: CVE-2026-31958 CVE-2026-35536 CVE-2025-67724 CVE-2025-67725 CVE-2025-67726 CVE-2023-28370 CVE-2024-52804 Upstream summary: It was discovered that Tornado incorrectly handled parsing of large multipart request bodies. An attacker could possibly use […]

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CHAT