Operations

Windows Server 2016 — KB5030213 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5030213 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5030213 • MSRC update-guide entry Related CVEs: CVE-2023-36796 CVE-2023-36793 CVE-2023-36792 CVE-2023-38162 CVE-2023-38161 CVE-2023-38152 CVE-2023-38149 CVE-2023-38147  +12 more Affected components: Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2 on Windows Server 2016 Microsoft .NET Framework […]

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How to Perform a CIS Benchmark Audit on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Perform a CIS Benchmark Audit on Debian 12

  • August 14, 2023
  • Linux
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Introduction This guide explains how to Perform a CIS Benchmark Audit on Debian 12 on Debian 12 Bookworm. Debian Bookworm uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 12 install with […]

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Common Problems 120086

Debian 12 mdadm RAID Array Degraded After Drive Failure

  • August 14, 2023
  • Linux
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🔴 Critical   ⏱ 5–30 min  Last verified: 14 August 2023 Affected versions: Debian 12 📖 ~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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NetBSD 9.4 — cyrus-imapd-2.2.[4-8] — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — cyrus-imapd — vulnerability — patch and remediation guide

  • August 14, 2023
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Upstream summary: pkgsrc audit-packages flagged cyrus-imapd{,nb*} for vulnerability class 'remote-code-execution'. Reference: http://security.e-matters.de/advisories/152004.txt Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary […]

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Oracle Linux 9 — c-ares security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — c-ares security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2023-6635)

  • August 13, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 13 August 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-6635 Related CVEs: CVE-2022-4904 CVE-2023-31130 CVE-2023-31147 CVE-2023-31124 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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NetBSD 9.4 — emacs24-nox11-24.4* — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — emacs24-nox11 — vulnerability — patch and remediation guide

  • August 13, 2023
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2014-9483 Upstream summary: pkgsrc audit-packages flagged emacs24-nox11 for vulnerability class 'sensitive-information-disclosure'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2014-9483 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]

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How to Perform a CIS Benchmark Audit on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Perform a CIS Benchmark Audit on CentOS Stream 9

  • August 13, 2023
  • CentOS
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Introduction Setting up perform a cis benchmark audit on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Perform a CIS Benchmark Audit on CentOS Stream 9, with all the commands you need, the SELinux and firewalld […]

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Common Problems 120161

Debian 12 – Nginx fails config test due to duplicate or invalid directives

  • August 13, 2023
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 13 August 2023 Affected versions: Debian 12 📖 ~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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Amazon Linux 2023 — kernel-livepatch-6.1.61-85.141 — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — kernel-livepatch-6.1.61-85.141 — vulnerability — patch and remediation guide

  • August 13, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023LIVEPATCH-2023-020 Related CVEs: CVE-2023-6111 Upstream summary: A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. The function nft_trans_gc_catchall did not remove […]

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Debian 12 — cron — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — cron — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • August 13, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 13 August 2023 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2006-2607 CVE-2017-9525 CVE-2019-9704 CVE-2019-9705 CVE-2019-9706 Upstream summary: do_command.c in Vixie cron (vixie-cron) 4.1 does not check the return code of a setuid call, which might allow local users […]

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