Logging Monitoring

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

Oracle Linux 8 — tomcat — vulnerability — patch and remediation guide (ELSA-2023-5928)

🟠 High   ⏱ 15–60 min  Last verified: 12 April 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-5928 Related CVEs: CVE-2023-44487 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 Set Up ZFS on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Set Up ZFS on RHEL 8

ZFS is a combined file system and logical volume manager renowned for its data integrity guarantees, transparent compression, built-in snapshotting, and copy-on-write architecture. While ZFS is not included in the RHEL 8 kernel, the OpenZFS project provides compatible DKMS packages that build the kernel module on demand. This tutorial covers adding the OpenZFS repository, installing […]

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Oracle Linux 9 — java-11-openjdk — security and stability fixes — required update — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — java-11-openjdk — security and stability fixes — required update (ELSA-2023-4158)

🟡 Medium   ⏱ 10–30 min  Last verified: 11 April 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-4158 Related CVEs: CVE-2023-22036 CVE-2023-22041 CVE-2023-22049 CVE-2023-22006 CVE-2023-25193 CVE-2023-22045 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Amazon Linux 2023 — memcached — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — memcached — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2023-449 Related CVEs: CVE-2023-46852 CVE-2023-46853 Upstream summary: In Memcached before 1.6.22, a buffer overflow exists when processing multiget requests in proxy mode, if there are many spaces after the "get" […]

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Common Problems 113568

Windows Server 2012 R2 — Windows Update Client reports package conflict between LCU and out-of-band fix — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 11 April 2023 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Common Problems 112457

Windows Server 2019 – MPIO path failover stalls due to HBA driver defects – Fix and Prevention

🟠 High   ⏱ 5–30 min  Last verified: 11 April 2023 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 12 — cyrus-sasl-sql — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — cyrus-sasl-sql — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 April 2023 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: cyrus-sasl — Escape password for SQL insert/update commands Related CVEs: CVE-2022-24407 Upstream summary: Cyrus SASL 2.1.x Release Notes New in 2.1.28 reports: Escape password for SQL insert/update commands. Table of […]

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Amazon Linux 2 — log4j — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — log4j — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2022-1750 Related CVEs: CVE-2022-23302 CVE-2022-23305 CVE-2022-23307 CVE-2017-5645 CVE-2019-17571 CVE-2021-4104 CVE-2021-44228 Upstream summary: A flaw was found in the Java logging library Apache Log4j in version 1.x. JMSSink in Log4j 1.x […]

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Common Problems 111883

Windows Server 2022 – RDP session host hits max sessions unexpectedly – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 11 April 2023 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 22.04 — apparmor — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — apparmor — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 April 2023 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7035-1 Related CVEs: CVE-2016-1585 https://bugs.launchpad.net/apparmor/+bug/1597017 Upstream summary: It was discovered that the AppArmor policy compiler incorrectly generated looser restrictions than expected for rules allowing mount operations. A local attacker could […]

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