chris

How to Configure OpenDKIM with Postfix on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Configure OpenDKIM with Postfix on FreeBSD 15

Introduction This guide explains how to Configure OpenDKIM with Postfix 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 and Capsicum for fine-grained […]

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FreeBSD 15 — pt-openoffice — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — pt-openoffice — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 June 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: openoffice — DOC document heap overflow vulnerability Related CVEs: CVE-2004-0752 CVE-2005-0941 Upstream summary: AD-LAB reports that a heap-based buffer overflow vulnerability exists in OpenOffice's handling of DOC documents. When reading […]

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FreeBSD 15 — htmldoc — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — htmldoc — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 June 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: HTMLDOC — buffer overflow issues when reading AFM files and parsing page sizes Upstream summary: Michael Sweet reports: HTMLDOC 1.8.28 fixes some known security issues and formatting bugs. Changes include: […]

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How to Set Up DRBD Block Replication on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Set Up DRBD Block Replication on FreeBSD 15

Introduction FreeBSD 15 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up set up drbd block replication on FreeBSD 15 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from any Linux distribution. This […]

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How to Install Certbot and Automate Let's Encrypt Renewals on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install Certbot and Automate Let’s Encrypt Renewals on RHEL 9

Let’s Encrypt provides free, automated TLS certificates that are trusted by all major browsers. Certbot is the official ACME client that handles certificate issuance and renewal against the Let’s Encrypt CA. On RHEL 9, Certbot is available through the EPEL repository, making integration with Nginx and Apache straightforward. This tutorial walks through installing Certbot, obtaining […]

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FreeBSD 15 — et-openoffice — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — et-openoffice — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 June 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: openoffice — DOC document heap overflow vulnerability Related CVEs: CVE-2004-0752 CVE-2005-0941 Upstream summary: AD-LAB reports that a heap-based buffer overflow vulnerability exists in OpenOffice's handling of DOC documents. When reading […]

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Amazon Linux 2023 — kernel6.12 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — kernel6.12 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2026-1708 Related CVEs: CVE-2026-46300 CVE-2025-71269 CVE-2026-22986 CVE-2026-23302 CVE-2026-23374 CVE-2026-23389 CVE-2026-23442 CVE-2026-31407  +12 more Upstream summary: In the Linux kernel, the following vulnerability has been resolved: net: skbuff: propagate shared-frag marker […]

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FreeBSD 14 — openexr — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 14

FreeBSD 14 — openexr — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 14 June 2026 Affected versions: FreeBSD 14 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: openexr — multiple vulnerabilities Related CVEs: CVE-2018-18443 CVE-2018-18444 CVE-2021-20296 CVE-2021-3474 CVE-2021-3475 CVE-2021-3476 CVE-2021-3477 CVE-2021-3478  +12 more Upstream summary: Cary Phillips reports: [OpenEXR v3.4.11 is a p]atch release that addresses the […]

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FreeBSD 15 — shtool — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 15

FreeBSD 15 — shtool — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 June 2026 Affected versions: FreeBSD 15 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: shtool — insecure temporary file creation Upstream summary: A Zataz advisory reports that shtool contains a security flaw which could allow a malicious local user to create or overwrite the […]

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Windows Server 2022 — KB5075912 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2022

Windows Server 2022 — KB5075912 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5075912 • MSRC update-guide entry Related CVEs: CVE-2026-21519 CVE-2026-21248 CVE-2026-21247 CVE-2026-21242 CVE-2026-21235 CVE-2026-21234 CVE-2026-21236 CVE-2026-21533  +12 more Affected components: Windows Server 2022 Windows Server 2022, 23H2 Edition (Server Core installation) Microsoft summary: […]

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