Security Hardening

Ubuntu 16.04 — qpdf — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — qpdf — multiple vulnerabilities (16 CVEs) — patch and remediation guide

  • July 10, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 10 July 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5026-2 Related CVEs: CVE-2018-18020 CVE-2021-36978 CVE-2015-9252 CVE-2017-11624 CVE-2017-11625 CVE-2017-11626 CVE-2017-11627 CVE-2017-12595  +8 more Upstream summary: USN-5026-1 fixed several vulnerabilities in QPDF. This update provides the corresponding update for Ubuntu 16.04 […]

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How to Set Up AIX System Resource Controller (SRC) Subsystems on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Set Up AIX System Resource Controller (SRC) Subsystems on IBM AIX 7.1

  • July 10, 2021
  • IBM AIX
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Introduction IBM AIX 7.1 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to set up aix system resource controller (src) subsystems on […]

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SLES 15 — libcroco — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libcroco — multiple vulnerabilities (5 CVEs) — patch and remediation guide

  • July 10, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 10 July 2021 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-IU-2021:741-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-12825 CVE-2017-7960 CVE-2017-7961 CVE-2017-8834 CVE-2017-8871 Upstream summary: libcroco through 0.6.13 has excessive recursion in cr_parser_parse_any_core in cr-parser.c, leading to stack consumption. Table of contents Symptom […]

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SLES 15 — ruby2.5-rubygem-websocket-extensions — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — ruby2.5-rubygem-websocket-extensions — vulnerability — patch and remediation guide

  • July 10, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 10 July 2021 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2023:0127-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-7663 Upstream summary: websocket-extensions ruby module prior to 0.1.5 allows Denial of Service (DoS) via Regex Backtracking. The extension parser may take quadratic time when […]

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Oracle Linux 8 — idm:DL1 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — idm:DL1 — vulnerability — patch and remediation guide (ELSA-2021-5142)

  • July 10, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 10 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-5142 Related CVEs: CVE-2020-25719 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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Oracle Linux 8 — go-toolset:ol8 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — go-toolset:ol8 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-3076)

  • July 9, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 9 July 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-3076 Related CVEs: CVE-2021-31525 CVE-2021-27918 CVE-2021-33196 CVE-2021-34558 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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AlmaLinux 8 — qt5-qtxmlpatterns — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — qt5-qtxmlpatterns — vulnerability — patch and remediation guide

  • July 9, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:4172 Related CVEs: CVE-2021-3481 Upstream summary: Qt is a software toolkit for developing applications. The following packages have been upgraded to a later upstream version: adwaita-qt (1.2.1), python-qt5 (5.15.0), qgnomeplatform (0.7.1), qt5 […]

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How to Manage Packages with Zypper on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Manage Packages with Zypper on SLES 15

Introduction This tutorial covers How to Manage Packages with Zypper 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. Step 1 — Refresh Repositories zypper refresh Step 2 — Search […]

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

FreeBSD 13 — tdiary — vulnerability — patch and remediation guide

  • July 9, 2021
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 9 July 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: tdiary — injection vulnerability Related CVEs: CVE-2006-6174 Upstream summary: An undisclosed eRuby injection vulnerability had been discovered in tDiary. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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FreeBSD 12 — py37-ansible — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — py37-ansible — multiple vulnerabilities (6 CVEs) — patch and remediation guide

  • July 9, 2021
  • BSD
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🟡 Medium   ⏱ 10–30 min  Last verified: 9 July 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-ansible — multiple vulnerabilities Related CVEs: CVE-2020-10744 CVE-2020-25635 CVE-2020-25636 CVE-2021-3532 CVE-2021-3583 CVE-2021-3620 Upstream summary: abeluck reports: A flaw was found in Ansible Base when using the aws_ssm connection plugin as […]

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