Security Hardening

Alpine Linux edge — doas — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — doas — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 6.8-r1 📖 ~4 min read  •  Source: Alpine secdb entry — doas 6.8-r1 Related CVEs: CVE-2019-25016 Upstream summary: Alpine main repository for vedge ships doas 6.8-r1 which addresses CVE-2019-25016. Table of contents Symptom & Impact Environment […]

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FreeBSD 12 — ImageMagick-nox — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — ImageMagick-nox — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 21 July 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: ImageMagick — denial of service via a crafted font file Related CVEs: CVE-2004-0827 CVE-2004-0981 CVE-2005-0005 CVE-2005-0397 CVE-2006-5868 CVE-2007-4985 CVE-2007-4986 CVE-2007-4987  +12 more Upstream summary: MITRE reports: The ReadCAPTIONImage function in […]

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Common Problems 113072

Windows Server 2016 — NLB multicast mode conflicts with upstream switch ARP handling and causes packet loss — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 20 July 2019 Affected versions: Windows Server 2016 📖 ~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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openSUSE Tumbleweed — nasm — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — nasm — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2019:14246-1 (see also SUSE bugzilla) Related CVEs: CVE-2017-14228 CVE-2017-17810 CVE-2017-11111 CVE-2017-17811 CVE-2017-17812 CVE-2017-17813 CVE-2017-17814 CVE-2017-17815  +5 more Upstream summary: In Netwide Assembler (NASM) 2.14rc0, there is an illegal address access in the […]

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FreeBSD 12 — xpm — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — xpm — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 July 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: xpm — image decoding vulnerabilities Related CVEs: CVE-2004-0687 CVE-2004-0688 Upstream summary: Chris Evans discovered several vulnerabilities in the libXpm image decoder: A stack-based buffer overflow in xpmParseColors An integer overflow […]

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FreeBSD 12 — rubygem19-json — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — rubygem19-json — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 July 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Ruby — Denial of Service and Unsafe Object Creation Vulnerability in JSON Related CVEs: CVE-2013-0269 Upstream summary: Aaron Patterson reports: When parsing certain JSON documents, the JSON gem can be […]

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Amazon Linux 2 — policycoreutils — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — policycoreutils — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2018-1076 Related CVEs: CVE-2018-1063 Upstream summary: Context relabeling of filesystems is vulnerable to symbolic link attack, allowing a local, unprivileged malicious entity to change the SELinux context of an arbitrary […]

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How to Configure Redis Sentinel on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Redis Sentinel on Debian 9

Introduction How to Configure Redis Sentinel on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch 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 9. This […]

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FreeBSD 12 — se-openoffice — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — se-openoffice — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 July 2019 Affected versions: FreeBSD 12 📖 ~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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