Common Problems

Common Problems 115061

RHEL 8 postfix Service Active but Not Listening on Expected Interface

🟡 Medium   ⏱ 5–30 min  Last verified: 23 July 2019 📖 ~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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Ubuntu 16.04 — jackd2 — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — jackd2 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 23 July 2019 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5656-1 Related CVEs: CVE-2019-13351 Upstream summary: Joseph Yasi discovered that JACK incorrectly handled the closing of a socket in certain conditions. An attacker could potentially use this issue to cause […]

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Common Problems 113621

Windows Server 2012 R2 — Windows Defender service definitions not loading — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 23 July 2019 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Ubuntu 18.04 — iproute2 — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — iproute2 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 23 July 2019 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4357-1 Related CVEs: CVE-2019-20795 Upstream summary: It was discovered that IPRoute incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. Table of contents Symptom […]

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SLES 15 — libmpfr6 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libmpfr6 — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 23 July 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory RHSA-2025:9332 (see also SUSE bugzilla) Related CVEs: CVE-2014-9474 Upstream summary: Buffer overflow in the mpfr_strtofr function in GNU MPFR before 3.1.2-p11 allows context-dependent attackers to have unspecified impact via vectors related to […]

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SLES 15 — perl-DBD-mysql — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — perl-DBD-mysql — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 23 July 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2017:0122-1 (see also SUSE bugzilla) Related CVEs: CVE-2016-1246 CVE-2016-1251 CVE-2017-10788 CVE-2017-10789 CVE-2016-1249 Upstream summary: Buffer overflow in the DBD::mysql module before 4.037 for Perl allows context-dependent attackers to cause a denial of […]

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Debian 10 — ruby-mini-magick — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — ruby-mini-magick — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 23 July 2019 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-13574 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 118994

Ubuntu 14.04 LTS Apache2 Fails to Start After Config Change

🟡 Medium   ⏱ 5–30 min  Last verified: 22 July 2019 📖 ~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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Common Problems 118057

Ubuntu 18.04 Nginx Fails to Start Due to Port 80 Conflict

🟡 Medium   ⏱ 5–30 min  Last verified: 22 July 2019 📖 ~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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Common Problems 118052

Ubuntu 18.04 LTS OpenSSL updates break legacy TLS clients

🟡 Medium   ⏱ 5–30 min  Last verified: 22 July 2019 📖 ~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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