Operations

How to Install Terraform on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Terraform on RHEL 7

How to Install Terraform on RHEL 7 Terraform is HashiCorp’s open-source Infrastructure as Code (IaC) tool that lets you define, provision, and manage cloud infrastructure using declarative configuration files. Instead of manually clicking through cloud consoles or writing fragile shell scripts, Terraform allows you to describe your desired infrastructure state — virtual machines, networks, storage […]

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AlmaLinux 8 — libuser — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — libuser — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2022:2040 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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FreeBSD 13 — courier — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — courier — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 July 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Courier mail services: remotely exploitable buffer overflows Related CVEs: CVE-2004-0224 Upstream summary: The Courier set of mail services use a common Unicode library. This library contains buffer overflows in the […]

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

Oracle Linux 8 — firefox — vulnerability — patch and remediation guide (ELSA-2020-3832)

🟠 High   ⏱ 15–60 min  Last verified: 1 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-3832 Related CVEs: CVE-2020-15676 CVE-2020-15678 CVE-2020-15677 CVE-2020-15673 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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Oracle Linux 8 — pki-core:10.6 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — pki-core:10.6 — vulnerability — patch and remediation guide (ELSA-2021-2235)

🟠 High   ⏱ 15–60 min  Last verified: 1 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-2235 Related CVEs: CVE-2021-3551 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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Arch Linux — libx11 — vulnerability — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — libx11 — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202105-12 Related CVEs: CVE-2021-31535 Upstream summary: Type: insufficient validation. Status: Fixed. Affected: 1.7.0-4. Fixed in: 1.7.1-1. Group: AVG-1968. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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FreeBSD 13 — apache+mod_ssl+mod_snmp+mod_accel+ipv — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — apache+mod_ssl+mod_snmp+mod_accel+ipv — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 30 June 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: apache — Prevent chunk-size integer overflow on platforms where sizeof(int) < sizeof(long) Related CVEs: CVE-2005-2088 CVE-2005-3352 CVE-2006-3747 Upstream summary: Apache ChangeLog reports: Integer overflow in the ap_proxy_send_fb function in proxy/proxy_util.c […]

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Oracle Linux 8 — mailman:2.1 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — mailman:2.1 — security and stability fixes — required update (ELSA-2020-4667)

🟡 Medium   ⏱ 10–30 min  Last verified: 30 June 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4667 Related CVEs: CVE-2020-12137 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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FreeBSD 13 — zathura-pdf-mupdf — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — zathura-pdf-mupdf — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 30 June 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: mupdf — multiple vulnerabilities Related CVEs: CVE-2016-6265 CVE-2016-6525 Upstream summary: Tobias Kortkamp reports: Heap-based buffer overflow in the pdf_load_mesh_params function in pdf/pdf-shade.c in MuPDF allows remote attackers to cause a […]

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Common Problems 121081

Service Fails to Start After Package Upgrade

🟠 High   ⏱ 5–30 min  Last verified: 30 June 2021 Affected versions: Debian 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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