Operations

Common Problems 111863

Windows Server 2022 – Kerberos authentication failures after time skew – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 27 October 2022 Affected versions: Windows Server 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 […]

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Ubuntu 18.04 — linux-gkeop-5.4 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — linux-gkeop-5.4 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 27 October 2022 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5562-1 Related CVEs: CVE-2022-0494 CVE-2022-1048 CVE-2022-1652 CVE-2022-1679 CVE-2022-1734 CVE-2022-1974 CVE-2022-1975 CVE-2022-2586  +12 more Upstream summary: Zhenpeng Lin discovered that the network packet scheduler implementation in the Linux kernel did not […]

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openSUSE Tumbleweed — libopusfile0 — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libopusfile0 — vulnerability — 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-2024:0013-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-47021 Upstream summary: A null pointer dereference issue was discovered in functions op_get_data and op_open1 in opusfile.c in xiph opusfile 0.9 thru 0.12 allows attackers […]

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Oracle Linux 8 — grub2 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — grub2 — vulnerability — patch and remediation guide (ELSA-2022-9471)

🟠 High   ⏱ 15–60 min  Last verified: 27 October 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-9471 Related CVEs: CVE-2021-3696 CVE-2022-28733 CVE-2021-3697 CVE-2022-28734 CVE-2021-3695 CVE-2022-28735 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Oracle Linux 8 — dovecot — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dovecot — vulnerability — patch and remediation guide (ELSA-2022-7623)

🟡 Medium   ⏱ 10–30 min  Last verified: 27 October 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7623 Related CVEs: CVE-2022-30550 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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How to Enable SSL/TLS with Let's Encrypt on Apache2 on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Enable SSL/TLS with Let’s Encrypt on Apache2 on Debian 11

Introduction How to Enable SSL/TLS with Let’s Encrypt on Apache2 on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye 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 […]

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IBM AIX 7.3 — CVE-2002-0746 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.3

IBM AIX 7.3 — CVE-2002-0746 — vulnerability — patch and remediation guide

🟠 High   ⏱ 30–90 min  Last verified: 27 October 2022 Affected versions: IBM AIX 7.3 📖 ~4 min read  •  Source: NVD CVE-2002-0746, IBM PSIRT advisory page CVE: CVE-2002-0746 NVD summary: Vulnerability in template.dhcpo in AIX 4.3.3 related to an insecure linker argument. References: archives.neohapsis.com/archives/aix/2002-q2/0005   archives.neohapsis.com/archives/aix/2002-q2/0005 Table of contents Symptom & Impact Environment […]

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Debian 11 — 389-ds-base — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — 389-ds-base — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 27 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-4450 CVE-2013-0312 CVE-2013-0336 CVE-2013-1897 CVE-2013-2219 CVE-2013-4283 CVE-2013-4485 CVE-2014-0132  +12 more Upstream summary: 389 Directory Server 1.2.10 does not properly update the ACL when a DN entry is moved […]

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Debian 11 — mbedtls — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — mbedtls — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 27 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-14032 CVE-2017-18187 CVE-2017-2784 CVE-2018-0487 CVE-2018-0488 CVE-2018-0497 CVE-2018-0498 CVE-2018-1000520  +12 more Upstream summary: ARM mbed TLS before 1.3.21 and 2.x before 2.1.9, if optional authentication is configured, allows remote […]

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