Security Hardening

Debian 12 — mariadb — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Debian 12

Debian 12 — mariadb — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 9 August 2025 Affected versions: Debian 12 (bookworm) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2022-47015 CVE-2023-22084 CVE-2023-52969 CVE-2023-52970 CVE-2023-52971 CVE-2024-21096 CVE-2025-13699 CVE-2025-21490  +3 more Upstream summary: MariaDB Server before 10.3.34 thru 10.9.3 is vulnerable to Denial of Service. It is possible for […]

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NetBSD 9.4 — py-markdown — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 9.4

NetBSD 9.4 — py-markdown — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: NetBSD 9.4 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2025-69534 Upstream summary: pkgsrc audit-packages flagged py{27,310,311,312,313,314}-markdown<3.8.1 for vulnerability class 'denial-of-service'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2025-69534 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]

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Ubuntu 24.04 — bubblewrap — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 24.04

Ubuntu 24.04 — bubblewrap — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 9 August 2025 Affected versions: Ubuntu 24.04 (noble) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7046-1 Related CVEs: CVE-2024-42472 https://launchpad.net/bugs/2077087 Upstream summary: It was discovered that Flatpak incorrectly handled certain persisted directories. An attacker could possibly use this issue to read and write files in […]

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Alpine Linux 3.20 — zlib-ng — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — zlib-ng — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 2.0.6-r0 📖 ~4 min read  •  Source: Alpine secdb entry — zlib-ng 2.0.6-r0 Related CVEs: CVE-2022-37434 Upstream summary: Alpine community repository for vv3.20 ships zlib-ng 2.0.6-r0 which addresses CVE-2022-37434. Table of contents Symptom & Impact Environment […]

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SLES 15 — golang-github-prometheus-alertmanager — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — golang-github-prometheus-alertmanager — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 9 August 2025 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2024:0191-1 (see also SUSE bugzilla) Related CVEs: CVE-2023-40577 CVE-2025-47908 Upstream summary: Alertmanager handles alerts sent by client applications such as the Prometheus server. An attacker with the permission to perform POST requests […]

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Common Problems 111219

Windows Server 2025 — SQL Server login failure after AD group membership cache delay on Server 2025 — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 August 2025 Affected versions: Windows Server 2025 📖 ~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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Alpine Linux 3.20 — xscreensaver — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — xscreensaver — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 6.02-r0 📖 ~4 min read  •  Source: Alpine secdb entry — xscreensaver 6.02-r0 Related CVEs: CVE-2021-34557 Upstream summary: Alpine community repository for vv3.20 ships xscreensaver 6.02-r0 which addresses CVE-2021-34557. Table of contents Symptom & Impact Environment […]

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How to Install Cassandra on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Cassandra on Oracle Linux 10

Introduction Oracle Linux 10 ships with a stable, security-hardened base that makes deploying install cassandra on oracle linux 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Install Cassandra on Oracle Linux 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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Rocky Linux 8 — perl-Text-ParseWords — vulnerability — patch and remediation guide — diagnosis and fix on Rocky Linux 8

Rocky Linux 8 — perl-Text-ParseWords — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 8 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2026:8096 Related CVEs: CVE-2025-40909 Upstream summary: Perl is a high-level programming language that is commonly used for system administration utilities and web programming. Security Fix(es): * perl: Perl threads have […]

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

Oracle Linux 9 — python3.9 — vulnerability — patch and remediation guide (ELSA-2025-23342)

🟡 Medium   ⏱ 10–30 min  Last verified: 9 August 2025 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-23342 Related CVEs: CVE-2024-5642 CVE-2025-6069 CVE-2025-6075 CVE-2025-8291 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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CHAT