Package Management

Debian 11 — git-annex — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — git-annex — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 4 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2014-6274 CVE-2017-12976 CVE-2018-10857 CVE-2018-10859 Upstream summary: git-annex had a bug in the S3 and Glacier remotes where if embedcreds=yes was set, and the remote used encryption=pubkey or encryption=hybrid, […]

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Debian 11 — xfsprogs — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — xfsprogs — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-2150 Upstream summary: xfs_metadump in xfsprogs before 3.2.4 does not properly obfuscate file data, which allows remote attackers to obtain sensitive information by reading a generated image. Table […]

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How to Configure Disk Encryption with GELI on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Disk Encryption with GELI on FreeBSD 13

Introduction This guide explains how to Configure Disk Encryption with GELI on FreeBSD 13 on FreeBSD 13. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for […]

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Gentoo Linux — app-text/mupdf — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — app-text/mupdf — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202408-29 Related CVEs: CVE-2021-4216 CVE-2021-37220 CVE-2020-26519 CVE-2021-3407 Upstream summary: Multiple vulnerabilities have been discovered in MuPDF. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment […]

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Ubuntu 20.04 — python-py — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — python-py — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 4 September 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5138-1 Related CVEs: CVE-2020-29651 Upstream summary: The py.path.svnwc component of py (aka python-py) through v1.9.0 contains a regular expression with an ambiguous subpattern that is susceptible to catastrophic backtracing. This […]

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Oracle Linux 8 — vim — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — vim — vulnerability — patch and remediation guide (ELSA-2022-0366)

🟡 Medium   ⏱ 10–30 min  Last verified: 4 September 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-0366 Related CVEs: CVE-2021-3872 CVE-2021-4192 CVE-2021-4193 CVE-2021-3984 CVE-2021-4019 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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How to Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7

How to Harden Nginx: Security Headers, TLS 1.3 and OCSP Stapling on RHEL 7 A default Nginx installation exposes unnecessary information about the server software, accepts outdated and broken TLS protocol versions, and omits the HTTP security headers that modern browsers rely on for protection against cross-site scripting, clickjacking, and protocol downgrade attacks. Hardening Nginx […]

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AlmaLinux 8 — ksh — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — ksh — 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-2020:1751 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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Common Problems 125023

Oracle Linux 8 – Common Problem 006 – Diagnosis and Fix

🟡 Medium   ⏱ 5–30 min  Last verified: 3 September 2021 Affected versions: Oracle Linux 8 📖 ~3 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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FreeBSD 13 — avahi-qt — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — avahi-qt — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 3 September 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: avahi — denial of service Related CVEs: CVE-2010-2244 CVE-2011-1002 Upstream summary: Avahi developers reports: A vulnerability has been reported in Avahi, which can be exploited by malicious people to cause […]

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