Security Hardening

Ubuntu 20.04 — linux-oracle-5.15 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — linux-oracle-5.15 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • October 25, 2025
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 October 2025 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8180-3 Related CVEs: CVE-2023-53421 CVE-2023-53520 CVE-2023-53662 CVE-2023-54207 CVE-2025-38057 CVE-2025-38125 CVE-2025-38232 CVE-2025-38408  +12 more Upstream summary: Several security issues were discovered in the Linux kernel. An attacker could possibly use these […]

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How to Install Podman on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Install Podman on Debian 13

  • October 25, 2025
  • Linux
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Introduction Debian 13 Trixie is built around the ethos of stability and free software. Setting up install podman on Trixie leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Trixie freeze. Follow each step carefully and the resulting configuration will persist […]

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Ubuntu 24.04 — lambdaisland-uri-clojure — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — lambdaisland-uri-clojure — vulnerability — patch and remediation guide

  • October 25, 2025
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 25 October 2025 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8151-1 Related CVEs: CVE-2023-28628 Upstream summary: It was discovered that lambdaisland/uri did not properly sanitize the backslash character in URI strings. An attacker could possibly use this issue to bypass […]

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Common Problems 119575

Debian 13 /boot Partition Full Blocks Kernel Updates

  • October 25, 2025
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 25 October 2025 Affected versions: Debian 13 📖 ~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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SLES 15 — perl-Authen-SASL — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — perl-Authen-SASL — vulnerability — patch and remediation guide

  • October 25, 2025
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 October 2025 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2025:03087-1 (see also SUSE bugzilla) Related CVEs: CVE-2025-40918 Upstream summary: Authen::SASL::Perl::DIGEST_MD5 versions 2.04 through 2.1800 for Perl generates the cnonce insecurely. The cnonce (client nonce) is generated from an MD5 hash of […]

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Oracle Linux 9 — httpd — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — httpd — vulnerability — patch and remediation guide (ELSA-2025-23919)

  • October 25, 2025
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 October 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-23919 Related CVEs: CVE-2025-58098 CVE-2025-65082 CVE-2025-66200 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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CentOS Stream 10 — libssh — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on CentOS Stream 10

CentOS Stream 10 — libssh — multiple vulnerabilities (2 CVEs) — patch and remediation guide

  • October 25, 2025
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 October 2025 Affected versions: CentOS Stream 10 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2025:23484 Related CVEs: CVE-2025-5987 CVE-2025-5318 Upstream summary: libssh is a library which implements the SSH protocol. It can be used to implement client and server applications. Security Fix(es): * libssh: Invalid […]

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Windows Server 2019 — KB5058454 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2019

Windows Server 2019 — KB5058454 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5058454 • MSRC update-guide entry Related CVEs: CVE-2025-32710 CVE-2025-29966 CVE-2025-29967 CVE-2025-47955 CVE-2025-29959 CVE-2025-29960 CVE-2025-29968 CVE-2025-29969  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Use after free in Windows […]

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How to Install InfluxDB 2 on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Install InfluxDB 2 on Debian 13

  • October 25, 2025
  • Linux
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Introduction How to Install InfluxDB 2 on Debian 13 is a fundamental operation for any administrator maintaining a Debian 13 Trixie server. Debian 13 Trixie ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 12. This […]

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Common Problems 111243

Windows Server 2025 — DNS record deregistration failing when client IP changes on Server 2025 — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 25 October 2025 Affected versions: Windows Server 2025 📖 ~2 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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