Security Hardening

How to Set Up a DHCP Server with ISC DHCP on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up a DHCP Server with ISC DHCP on RHEL 9

ISC DHCP (Internet Systems Consortium DHCP Server) is the most widely deployed open-source DHCP implementation and provides flexible IP address management for networks of any size. On RHEL 9, the dhcp-server package provides dhcpd, which handles both dynamic leases and static address reservations from a single configuration file. Although ISC announced the end-of-life of ISC […]

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Common Problems 114041

RHEL 10 – journald persistent logs consume excessive disk space – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 28 October 2025 Affected versions: RHEL 10 📖 ~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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IBM AIX 7.1 — CVE-2025-0154 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.1

IBM AIX 7.1 — CVE-2025-0154 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 28 October 2025 Affected versions: IBM AIX 7.1 📖 ~4 min read  •  Source: NVD CVE-2025-0154, IBM Support Bulletin CVE: CVE-2025-0154 NVD summary: IBM TXSeries for Multiplatforms 9.1 and 11.1 could disclose sensitive information to a remote attacker due to improper neutralization of HTTP headers. References: www.ibm.com/support/pages/node/7229880 […]

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Debian 13 — tcptraceroute — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — tcptraceroute — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 28 October 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0489 Upstream summary: tcptraceroute 1.4 and earlier does not fully drop privileges after obtaining a file descriptor for capturing packets, which may allow local users to gain access […]

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Debian 13 — libapache2-mod-perl2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — libapache2-mod-perl2 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 28 October 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2007-1349 CVE-2009-0796 CVE-2011-2767 Upstream summary: PerlRun.pm in Apache mod_perl before 1.30, and RegistryCooker.pm in mod_perl 2.x, does not properly escape PATH_INFO before use in a regular expression, which […]

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AlmaLinux 9 — opentelemetry-collector — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 9

AlmaLinux 9 — opentelemetry-collector — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 9 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2026:4177 Related CVEs: CVE-2025-61726 CVE-2025-68121 CVE-2025-61729 CVE-2025-68156 CVE-2025-4673 CVE-2025-22871 Upstream summary: Collector with the supported components for a AlmaLinux build of OpenTelemetry Security Fix(es): * golang: net/url: Memory exhaustion in query parameter […]

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How to Install Apache HTTP Server on Oracle Linux 10 — step-by-step Oracle Linux 10 tutorial on Progressive Robot

How to Install Apache HTTP Server on Oracle Linux 10

Introduction This tutorial demonstrates how to Install Apache HTTP Server on Oracle Linux 10 on Oracle Linux 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 10 system with the […]

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Common Problems 124141

Oracle Linux 10 – fapolicyd blocks execution of trusted in-house binary – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 28 October 2025 Affected versions: Oracle Linux 10 📖 ~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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Debian 13 — hylafax — multiple vulnerabilities (11 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — hylafax — multiple vulnerabilities (11 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 28 October 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2001-1034 CVE-2002-1049 CVE-2002-1050 CVE-2003-0886 CVE-2004-1182 CVE-2005-3069 CVE-2005-3070 CVE-2005-3538  +3 more Upstream summary: Format string vulnerability in Hylafax on FreeBSD allows local users to execute arbitrary code via format […]

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Debian 13 — librelp — vulnerability — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — librelp — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 28 October 2025 Affected versions: Debian 13 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-1000140 Upstream summary: rsyslog librelp version 1.2.14 and earlier contains a Buffer Overflow vulnerability in the checking of x509 certificates from a peer that can result in Remote code […]

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