Logging Monitoring

Debian 11 — leafnode — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — leafnode — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 2 September 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0744 CVE-2005-1453 CVE-2005-1911 Upstream summary: The fetchnews NNTP client in leafnode 1.9.3 to 1.9.41 allows remote attackers to cause a denial of service (process hang and termination) via […]

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How to Configure IPv6 Dual-Stack Networking on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure IPv6 Dual-Stack Networking on RHEL 7

How to Configure IPv6 Dual-Stack Networking on RHEL 7 IPv6 adoption has accelerated steadily, yet most production servers still need to serve IPv4 clients simultaneously. A dual-stack configuration allows a single network interface to carry both protocol versions concurrently, eliminating the need for tunneling or translation layers. On RHEL 7, NetworkManager provides the authoritative way […]

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Common Problems 120581

Debian 11 – LVM Thin Pool Metadata Full – Service Outage Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 1 September 2022 Affected versions: Debian 11 📖 ~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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Common Problems 117093

Ubuntu 22.04 LTS – KVM nested virtualization unavailable on Intel hosts – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 1 September 2022 Affected versions: Ubuntu 22.04 LTS 📖 ~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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How to Configure SSH on IBM AIX 7.3 — step-by-step IBM AIX 7.3 tutorial on Progressive Robot

How to Configure SSH on IBM AIX 7.3

Introduction IBM AIX 7.3 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.3 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure ssh on IBM AIX 7.3 with practical examples […]

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Alpine Linux edge — mutt — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — mutt — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 2.2.3-r0 📖 ~4 min read  •  Source: Alpine secdb entry — mutt 2.2.3-r0 Related CVEs: CVE-2022-1328 CVE-2021-3181 CVE-2020-28896 CVE-2020-14093 Upstream summary: Alpine community repository for vedge ships mutt 2.2.3-r0 which addresses CVE-2022-1328. Table of contents Symptom […]

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Common Problems 112625

Windows Server 2019 — MSU install fails with architecture mismatch on Server Core host — Fix & Prevention

🟢 Low   ⏱ 5–30 min  Last verified: 1 September 2022 Affected versions: Windows Server 2019 📖 ~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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FreeBSD 13 — hiredis — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — hiredis — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 September 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: hiredis — integer/buffer overflow Related CVEs: CVE-2021-32765 Upstream summary: hiredis maintainers report: Hiredis is vulnurable to integer overflow if provided maliciously crafted or corrupted RESP mult-bulk protocol data. When parsing […]

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FreeBSD 13 — linux-f10-png — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — linux-f10-png — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 September 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: png — memory corruption/possible remote code execution Related CVEs: CVE-2011-3048 Upstream summary: The PNG project reports: libpng fails to correctly handle malloc() failures for text chunks (in png_set_text_2()), which can […]

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