Linux

Debian 11 — otrs2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — otrs2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 27 January 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2007-2524 CVE-2008-1515 CVE-2008-7220 CVE-2008-7275 CVE-2008-7276 CVE-2008-7277 CVE-2008-7278 CVE-2008-7279  +12 more Upstream summary: Cross-site scripting (XSS) vulnerability in index.pl in Open Ticket Request System (OTRS) 2.0.x allows remote attackers […]

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Alpine Linux edge — cri-o — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — cri-o — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 1.26.2-r0 📖 ~4 min read  •  Source: Alpine secdb entry — cri-o 1.26.2-r0 Related CVEs: CVE-2022-4318 CVE-2022-1708 CVE-2022-0811 Upstream summary: Alpine community repository for vedge ships cri-o 1.26.2-r0 which addresses CVE-2022-4318. Table of contents Symptom & […]

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Oracle Linux 8 — samba — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — samba — security and stability fixes — required update (ELSA-2023-4328)

🟡 Medium   ⏱ 10–30 min  Last verified: 26 January 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-4328 Related CVEs: CVE-2023-3347 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 ModSecurity WAF on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Set Up ModSecurity WAF on CentOS Stream 9

Introduction This tutorial demonstrates how to Set Up ModSecurity WAF on CentOS Stream 9 on CentOS Stream 9. 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 CentOS Stream 9 system with the […]

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Common Problems 117582

Ubuntu 20.04 LTS Failing TLS Due to Expired CA Bundle

🟠 High   ⏱ 5–30 min  Last verified: 26 January 2022 Affected versions: 20.04 LTS 📖 ~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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AlmaLinux 8 — xorg-x11-drv-wacom — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — xorg-x11-drv-wacom — 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-2020:1633 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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Debian 11 — tcptraceroute — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — tcptraceroute — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 26 January 2022 Affected versions: Debian 11 (bullseye) 📖 ~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 11 — ntirpc — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — ntirpc — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 26 January 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-8779 Upstream summary: rpcbind through 0.2.4, LIBTIRPC through 1.0.1 and 1.0.2-rc through 1.0.2-rc3, and NTIRPC through 1.4.3 do not consider the maximum RPC data size during memory allocation […]

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Common Problems 115533

RHEL 7 – Yum Hangs Behind Proxy with SSL Inspection

🟡 Medium   ⏱ 5–30 min  Last verified: 26 January 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 & Cross-Refs References & Further […]

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Alpine Linux edge — openrazer — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — openrazer — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 3.5.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — openrazer 3.5.1-r0 Related CVEs: CVE-2022-23467 CVE-2022-29021 CVE-2022-29022 CVE-2022-29023 Upstream summary: Alpine community repository for vedge ships openrazer 3.5.1-r0 which addresses CVE-2022-23467. Table of contents Symptom […]

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