Security Hardening

How to Use svmon for Memory Analysis on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Use svmon for Memory Analysis on IBM AIX 7.1

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 use svmon for memory analysis on ibm aix 7.1 […]

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FreeBSD 12 — pkg-devel — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — pkg-devel — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 January 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: pkg — vulnerability in libfetch Related CVEs: CVE-2013-6393 CVE-2020-7450 Upstream summary: A programming error allows an attacker who can specify a URL with a username and/or password components to overflow […]

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How to Automate Windows Server 2012 R2 Provisioning with PowerShell and MDT — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Automate Windows Server 2012 R2 Provisioning with PowerShell and MDT

How to Set Up DirectAccess for Always-On VPN on Windows Server 2012 R2 DirectAccess is Microsoft’s always-on connectivity technology for domain-joined Windows clients. Unlike traditional VPN that requires a user to manually connect, DirectAccess automatically establishes a secure IPv6-over-IPv4 tunnel whenever the client computer detects it is outside the corporate network — before the user […]

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SLES 12 — zsh — multiple vulnerabilities (14 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — zsh — multiple vulnerabilities (14 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 19 January 2021 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2018:1037-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-1100 CVE-2019-20044 CVE-2021-45444 CVE-2018-0502 CVE-2018-13259 CVE-2014-10070 CVE-2017-18206 CVE-2014-10071  +6 more Upstream summary: zsh through version 5.4.2 is vulnerable to a stack-based buffer overflow in the […]

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openSUSE Tumbleweed — python36-sqlparse — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python36-sqlparse — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2021:3857-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-32839 Upstream summary: sqlparse is a non-validating SQL parser module for Python. In sqlparse versions 0.4.0 and 0.4.1 there is a regular Expression Denial of […]

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Oracle Linux 8 — rust-toolset:ol8 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — rust-toolset:ol8 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-1935)

🟢 Low   ⏱ 5–15 min  Last verified: 18 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1935 Related CVEs: CVE-2020-36317 CVE-2020-36318 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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Common Problems 121469

Debian 9 APT Lock Contention During Package Operations

🟡 Medium   ⏱ 5–30 min  Last verified: 18 January 2021 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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Common Problems 118584

Ubuntu 16.04 LTS Docker daemon fails with overlay2 mount errors

🟠 High   ⏱ 5–30 min  Last verified: 18 January 2021 Affected versions: 16.04 📖 ~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 […]

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IBM AIX 7.2 — CVE-2021-38954 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.2

IBM AIX 7.2 — CVE-2021-38954 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 18 January 2021 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2021-38954, IBM Support Bulletin CVE: CVE-2021-38954 NVD summary: IBM Sterling B2B Integrator Standard Edition 6.0.0.0 through 6.0.3.5 and 6.1.0.0 through 6.1.1.0 could disclose sensitive version information that could aid in future attacks […]

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Common Problems 118424

Ubuntu 16.04 LTS DNS resolution fails intermittently on production hosts

🟠 High   ⏱ 5–30 min  Last verified: 18 January 2021 Affected versions: 16.04 📖 ~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 […]

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