Operations

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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FreeBSD 13 — krb5-appl — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — krb5-appl — 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: krb5-appl — telnetd code execution vulnerability Related CVEs: CVE-2011-4862 Upstream summary: The MIT Kerberos Team reports: When an encryption key is supplied via the TELNET protocol, its length is not […]

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Debian 11 — policyd-weight — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — policyd-weight — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 September 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-1569 CVE-2008-1570 Upstream summary: policyd-weight 0.1.14 beta-16 and earlier allows local users to modify or delete arbitrary files via a symlink attack on temporary files that are used […]

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openSUSE Tumbleweed — zabbix-agent — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — zabbix-agent — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2022:0036-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-27927 CVE-2022-35230 CVE-2022-24349 CVE-2020-15803 CVE-2022-23134 Upstream summary: In Zabbix from 4.0.x before 4.0.28rc1, 5.0.0alpha1 before 5.0.10rc1, 5.2.x before 5.2.6rc1, and 5.4.0alpha1 before 5.4.0beta2, the CControllerAuthenticationUpdate […]

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How to Configure ifconfig Networking on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure ifconfig Networking on FreeBSD 12

Introduction This guide explains how to Configure ifconfig Networking on FreeBSD 12 on FreeBSD 12. 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 privilege […]

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Debian 11 — geneweb — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — geneweb — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 September 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2002-1390 CVE-2005-0391 Upstream summary: The daemon for GeneWeb before 4.09 does not properly handle requested paths, which allows remote attackers to read arbitrary files via a crafted URL. […]

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openSUSE Tumbleweed — telnet — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — telnet — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:3471-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-39028 Upstream summary: telnetd in GNU Inetutils through 2.3, MIT krb5-appl through 1.0.3, and derivative works has a NULL pointer dereference via 0xff 0xf7 or […]

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Common Problems 114533

RHEL 9 OpenSSH key authentication denied unexpectedly

🟡 Medium   ⏱ 5–30 min  Last verified: 1 September 2022 📖 ~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 & Cross-Refs References & Further […]

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