Security Hardening

Ubuntu 18.04 — libgd2 — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libgd2 — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 1 June 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7112-1 Related CVEs: CVE-2021-40812 CVE-2017-6363 CVE-2021-38115 CVE-2021-40145 CVE-2018-14553 CVE-2019-11038 CVE-2019-6977 CVE-2019-6978  +2 more Upstream summary: It was discovered that the GD Graphics Library did not perform proper bounds checking while […]

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SLES 12 — libexempi3 — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — libexempi3 — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 1 June 2021 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2023:3734-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-18651 CVE-2017-18234 CVE-2017-18233 CVE-2017-18236 CVE-2017-18238 CVE-2018-7728 CVE-2018-7730 Upstream summary: Buffer Overflow vulnerability in function ID3_Support::ID3v2Frame::getFrameValue in exempi 2.5.0 and earlier allows remote attackers to cause […]

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SLES 12 — python-PyYAML — vulnerability — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — python-PyYAML — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 1 June 2021 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-CU-2021:197-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-14343 Upstream summary: A vulnerability was discovered in the PyYAML library in versions before 5.4, where it is susceptible to arbitrary code execution when it […]

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Alpine Linux edge — quassel — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — quassel — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 0.13.1-r6 📖 ~4 min read  •  Source: Alpine secdb entry — quassel 0.13.1-r6 Related CVEs: CVE-2021-34825 Upstream summary: Alpine community repository for vedge ships quassel 0.13.1-r6 which addresses CVE-2021-34825. Table of contents Symptom & Impact Environment […]

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Debian 10 — ntfs-3g — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — ntfs-3g — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 1 June 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-33285 CVE-2021-46790 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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Oracle Linux 8 — php:7.4 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — php:7.4 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-4213)

🟡 Medium   ⏱ 10–30 min  Last verified: 31 May 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4213 Related CVEs: CVE-2020-7068 CVE-2020-7069 CVE-2020-7071 CVE-2021-21702 CVE-2020-7070 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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IBM AIX 7.1 — CVE-2021-29816 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.1

IBM AIX 7.1 — CVE-2021-29816 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 31 May 2021 Affected versions: IBM AIX 7.1 📖 ~4 min read  •  Source: NVD CVE-2021-29816, IBM Support Bulletin CVE: CVE-2021-29816 NVD summary: IBM Jazz for Service Management 1.1.3.10 and IBM Tivoli Netcool/OMNIbus_GUI is vulnerable to cross-site request forgery which could allow an attacker to execute malicious […]

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Common Problems 118947

Ubuntu 14.04 LTS GRUB Rescue Prompt After Bootloader Changes

🟡 Medium   ⏱ 5–30 min  Last verified: 31 May 2021 📖 ~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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How to Configure Container Networking on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Configure Container Networking on SLES 15

Introduction This tutorial covers How to Configure Container Networking 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 refresh […]

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FreeBSD 13 — py39-cairosvg — security advisory — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py39-cairosvg — security advisory — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 May 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: CairoSVG — Regular Expression Denial of Service vulnerability Upstream summary: CairoSVG security advisories: When processing SVG files, the python package CairoSVG uses two regular expressions which are vulnerable to Regular […]

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