July 2022 - Page 33 of 72

How to Set Up SSH Key Authentication on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Set Up SSH Key Authentication on Debian 11

Introduction This guide explains how to Set Up SSH Key Authentication on Debian 11 on Debian 11 Bullseye. Debian Bullseye uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 11 install with […]

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AlmaLinux 8 — libepubgen — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — libepubgen — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:1586 Related CVEs: CVE-2019-13012 CVE-2020-13543 CVE-2020-13584 CVE-2020-16125 CVE-2020-9948 CVE-2020-9951 CVE-2020-9983 CVE-2021-1817  +4 more Upstream summary: GNOME is the default desktop environment of AlmaLinux. The following packages have been upgraded to a later […]

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

FreeBSD 13 — procmail — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: procmail — Heap-based buffer overflow Related CVEs: CVE-2017-16844 Upstream summary: MITRE reports: A remote attacker could use a flaw to cause formail to crash, resulting in a denial of service […]

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Oracle Linux 8 — ruby:3.1 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — ruby:3.1 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2024-3546)

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-3546 Related CVEs: CVE-2024-27281 CVE-2024-27282 CVE-2024-27280 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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FreeBSD 13 — py35-salt — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py35-salt — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: salt — multiple vulnerabilities in salt-master process Related CVEs: CVE-2016-1866 CVE-2016-3176 CVE-2017-12791 CVE-2017-14695 CVE-2017-14696 CVE-2018-15750 CVE-2018-15751 CVE-2019-17361  +2 more Upstream summary: F-Secure reports: CVE-2020-11651 – Authentication bypass vulnerabilities The ClearFuncs […]

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FreeBSD 13 — apache-worker — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — apache-worker — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Apache — Insecure LD_LIBRARY_PATH handling Related CVEs: CVE-2011-3192 CVE-2012-0883 Upstream summary: Apache reports: Insecure handling of LD_LIBRARY_PATH was found that could lead to the current working directory to be searched […]

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FreeBSD 13 — php4-gd — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — php4-gd — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: gd — '_gdGetColors' remote buffer overflow vulnerability Related CVEs: CVE-2009-3546 Upstream summary: CVE reports: The _gdGetColors function in gd_gd.c in PHP 5.2.11 and 5.3.0, and the GD Graphics Library 2.x, […]

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Common Problems 120568

Debian 11 – SSH login denied after hardening changes

🟠 High   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 11 📖 ~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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