Linux

Debian 11 — libcommons-net-java — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libcommons-net-java — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 24 April 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-37533 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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Common Problems 116977

Ubuntu 22.04 SSH Login Delays Caused by Reverse DNS Lookup

🟡 Medium   ⏱ 5–30 min  Last verified: 24 April 2022 📖 ~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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Debian 11 — crmsh — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — crmsh — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 24 April 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-35459 Upstream summary: An issue was discovered in ClusterLabs crmsh through 4.2.1. Local attackers able to call "crm history" (when "crm" is run) were able to execute commands […]

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Debian 11 — p7zip — multiple vulnerabilities (18 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — p7zip — multiple vulnerabilities (18 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 24 April 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-6536 CVE-2015-1038 CVE-2016-2334 CVE-2016-2335 CVE-2016-9296 CVE-2017-17969 CVE-2022-47069 CVE-2022-47111  +10 more Upstream summary: Unspecified vulnerability in 7-zip before 4.5.7 has unknown impact and remote attack vectors, as demonstrated by […]

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Ubuntu 20.04 — dwarves-dfsg — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — dwarves-dfsg — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 24 April 2022 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6215-1 Related CVEs: CVE-2022-3534 CVE-2022-3606 Upstream summary: It was discovered that dwarves incorrectly handled certain memory operations under certain circumstances. An attacker could possibly use this issue to cause dwarves […]

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How to Install Amanda Network Backup on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install Amanda Network Backup on Debian 11

Introduction How to Install Amanda Network Backup on Debian 11 is a fundamental operation for any administrator maintaining a Debian 11 Bullseye server. Debian 11 Bullseye ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 11. […]

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

AlmaLinux 8 — ldns — 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-2019:3490 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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SLES 15 — snakeyaml — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — snakeyaml — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 24 April 2022 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2022:3397-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-38749 CVE-2022-38750 CVE-2022-38751 CVE-2022-38752 CVE-2017-18640 CVE-2022-25857 Upstream summary: Using snakeYAML to parse untrusted YAML files may be vulnerable to Denial of Service attacks (DOS). If […]

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

Oracle Linux 8 — rsyslog — vulnerability — patch and remediation guide (ELSA-2022-4799)

🟠 High   ⏱ 15–60 min  Last verified: 24 April 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-4799 Related CVEs: CVE-2022-24903 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 — xz — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — xz — vulnerability — patch and remediation guide (ELSA-2022-4991)

🟠 High   ⏱ 15–60 min  Last verified: 24 April 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-4991 Related CVEs: CVE-2022-1271 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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