Logging Monitoring

Gentoo Linux — app-emulation/xen — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — app-emulation/xen — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • May 18, 2023
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202402-07 Related CVEs: CVE-2021-28703 CVE-2021-28704 CVE-2021-28705 CVE-2021-28706 CVE-2021-28707 CVE-2021-28708 CVE-2021-28709 CVE-2022-23816  +12 more Upstream summary: Multiple vulnerabilities have been discovered in Xen. Please review the CVE identifiers referenced below for details. Table […]

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Amazon Linux 2 — openldap — multiple vulnerabilities (18 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — openldap — multiple vulnerabilities (18 CVEs) — patch and remediation guide

  • May 18, 2023
  • Linux
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🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2022-1796 Related CVEs: CVE-2022-29155 CVE-2019-13565 CVE-2020-36221 CVE-2020-36222 CVE-2020-36223 CVE-2020-36224 CVE-2020-36226 CVE-2020-36227  +10 more Upstream summary: In OpenLDAP 2.x before 2.5.12 and 2.6.x before 2.6.2, a SQL injection vulnerability exists in […]

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Oracle Linux 9 — python3.11 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — python3.11 — vulnerability — patch and remediation guide (ELSA-2023-6494)

  • May 18, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 18 May 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-6494 Related CVEs: CVE-2023-41105 CVE-2007-4559 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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How to Configure the Firewall on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Configure the Firewall on RHEL 8

  • May 18, 2023
  • Linux
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RHEL 8 ships with firewalld as its default firewall management layer, replacing the older iptables static ruleset approach with a dynamic, zone-based model. Zones define the level of trust assigned to network interfaces and traffic sources, and rules can be added or removed at runtime without flushing the entire ruleset. This guide covers the essential […]

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Common Problems 124517

Oracle Linux 9 – Common Problem 006 – Diagnosis and Fix

  • May 17, 2023
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 17 May 2023 Affected versions: Oracle Linux 9 📖 ~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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IBM AIX 7.3 — CVE-2020-4591 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.3

IBM AIX 7.3 — CVE-2020-4591 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 10–30 min  Last verified: 17 May 2023 Affected versions: IBM AIX 7.3 📖 ~4 min read  •  Source: NVD CVE-2020-4591, IBM Support Bulletin CVE: CVE-2020-4591 NVD summary: IBM Spectrum Protect Server 8.1.0.000 through 8.1.10.000 could disclose sensitive information in nondefault settings due to occasionally not encrypting the second chunk of an […]

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Amazon Linux 2023 — pkgconf — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — pkgconf — vulnerability — patch and remediation guide

  • May 17, 2023
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2023-159 Related CVEs: CVE-2023-24056 Upstream summary: In pkgconf through 1.9.3, variable duplication can cause unbounded string expansion due to incorrect checks in libpkgconf/tuple.c:pkgconf_tuple_parse. For example, a .pc file containing a […]

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Common Problems 115455

RHEL 7 yum Lock Held by PackageKit

  • May 17, 2023
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 17 May 2023 Affected versions: RHEL 7 📖 ~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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