Common Problems

Arch Linux — libdwarf — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — libdwarf — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201612-4 Related CVEs: CVE-2016-9558 CVE-2016-9480 CVE-2016-9276 CVE-2016-9275 CVE-2016-8681 CVE-2016-8680 CVE-2016-8679 CVE-2016-7511  +12 more Upstream summary: Type: multiple issues. Status: Fixed. Affected: 20161021-1. Fixed in: 20161124-1. Group: AVG-89. Table of contents […]

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FreeBSD 12 — lbreakout — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — lbreakout — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: lbreakout2 vulnerability in environment variable handling Related CVEs: CVE-2004-0158 Upstream summary: Ulf Härnhammar discovered an exploitable vulnerability in lbreakout2's environmental variable handling. In several instances, the contents of the HOME […]

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FreeBSD 12 — rubygem-railties — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — rubygem-railties — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 19 September 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: rails — multiple vulnerabilities Related CVEs: CVE-2013-4491 CVE-2013-6414 CVE-2013-6415 CVE-2013-6416 CVE-2013-6417 Upstream summary: Rails weblog: Rails 3.2.16 and 4.0.2 have been released! These two releases contain important security fixes, so […]

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Debian 10 — ruby-rack-cors — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — ruby-rack-cors — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 September 2019 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-18978 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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SLES 15 — libgc1 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libgc1 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 19 September 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2012-2673 Upstream summary: Multiple integer overflows in the (1) GC_generic_malloc and (2) calloc functions in malloc.c, and the (3) GC_generic_malloc_ignore_off_page function in mallocx.c in Boehm-Demers-Weiser […]

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

Oracle Linux 8 — GraalVM — vulnerability — patch and remediation guide (ELSA-2023-12670)

🟠 High   ⏱ 15–60 min  Last verified: 19 September 2019 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-12670 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 […]

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Arch Linux — mediawiki — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — mediawiki — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-201711-20 Related CVEs: CVE-2017-8815 CVE-2017-8814 CVE-2017-8812 CVE-2017-8811 CVE-2017-8810 CVE-2017-8809 CVE-2017-8808 CVE-2017-0361  +12 more Upstream summary: Type: multiple issues. Status: Fixed. Affected: 1.29.1-1. Fixed in: 1.29.2-1. Group: AVG-490. Table of contents […]

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Common Problems 121673

Debian 9: certbot renewal fails because web server port is occupied

🟠 High   ⏱ 5–30 min  Last verified: 18 September 2019 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 121663

Debian 9: rsync over SSH fails after host key rotation

🟡 Medium   ⏱ 5–30 min  Last verified: 18 September 2019 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 121131

Permission Denied After Deployment

🟠 High   ⏱ 5–30 min  Last verified: 18 September 2019 Affected versions: Debian 10 📖 ~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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