Security Hardening

Common Problems 121529

Debian 9 Repository 404 Not Found for Enabled Mirror

🟡 Medium   ⏱ 5–30 min  Last verified: 29 November 2019 Affected versions: Debian 9 📖 ~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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How to Schedule Tasks with Cron on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Schedule Tasks with Cron on SLES 15

Introduction This tutorial covers How to Schedule Tasks with Cron on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 15 system is up to date: zypper […]

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FreeBSD 12 — php70-soap — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — php70-soap — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: php7 — multiple vulnerabilities Upstream summary: The PHP Group reports: Core: Fixed bug #71637 (Multiple Heap Overflow due to integer overflows in xml/filter_url/addcslashes). SOAP: Fixed bug #71610 (Type Confusion Vulnerability […]

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FreeBSD 12 — django — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — django — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: django — multiple vulnerabilities Related CVEs: CVE-2012-4520 Upstream summary: The Django Project reports: Host header poisoning Several earlier Django security releases focused on the issue of poisoning the HTTP Host […]

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Ubuntu 16.04 — libntlm — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — libntlm — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 November 2019 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5108-2 Related CVEs: CVE-2019-17455 Upstream summary: USN-5108-1 fixed a vulnerability in Libntlm. This update provides the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. Original advisory details: It […]

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SLES 15 — tidy — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — tidy — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 29 November 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2015:1513-1 (see also SUSE bugzilla) Related CVEs: CVE-2015-5522 CVE-2015-5523 CVE-2016-6583 Upstream summary: Heap-based buffer overflow in the ParseValue function in lexer.c in tidy before 4.9.31 allows remote attackers to cause a denial […]

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Gentoo Linux — app-text/hunspell — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — app-text/hunspell — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202409-21 Upstream summary: Malicious input to the hunspell spell checker could result in an application crash or other unspecified behavior. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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SLES 12 — cron — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — cron — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 29 November 2019 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SA:2006:027 (see also SUSE bugzilla) Related CVEs: CVE-2006-2607 CVE-2010-0424 CVE-2019-9704 CVE-2019-9705 Upstream summary: do_command.c in Vixie cron (vixie-cron) 4.1 does not check the return code of a setuid call, which might allow […]

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Common Problems 118123

Ubuntu 18.04 filesystem mounted read-only after errors

🟡 Medium   ⏱ 5–30 min  Last verified: 28 November 2019 📖 ~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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Common Problems 117958

Ubuntu 18.04 LTS – SSH key authentication fails after hardening changes – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 28 November 2019 Affected versions: Ubuntu 18.04 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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