Troubleshooting

FreeBSD 12 — squashfs-tools — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — squashfs-tools — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 7 November 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: squashfs-tools — Integer overflow Related CVEs: CVE-2015-4645 Upstream summary: Phillip Lougher reports: Integer overflow in the read_fragment_table_4 function in unsquash-4.c in Squashfs and sasquatch allows remote attackers to cause a […]

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How to Configure Container Networking on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure Container Networking on Windows Server 2016

How to Configure Windows Server 2016 Container Networking Container networking on Windows Server 2016 is managed through the Host Networking Service (HNS) and exposed to Docker through network drivers. Windows supports several networking modes, each suited to different deployment scenarios: NAT for isolated single-host networking, Transparent for direct connectivity to the physical network, L2Bridge and […]

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Ubuntu 18.04 — mistral — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — mistral — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 November 2019 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7465-1 Related CVEs: CVE-2018-16848 CVE-2018-16849 CVE-2019-3866 Upstream summary: It was discovered that Mistral incorrectly handled nested anchors in YAML files. An attacker could possibly use this issue to cause a […]

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Gentoo Linux — dev-python/pycrypto — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — dev-python/pycrypto — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202007-62 Related CVEs: CVE-2018-6594 Upstream summary: It was discovered that PyCrypto incorrectly generated ElGamal key parameters. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]

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SLES 15 — netcdf-gnu-hpc — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — netcdf-gnu-hpc — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 November 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:3804-1 (see also SUSE bugzilla) Related CVEs: CVE-2019-20005 CVE-2019-20006 CVE-2019-20007 CVE-2019-20198 CVE-2019-20199 CVE-2019-20200 CVE-2019-20201 CVE-2019-20202  +8 more Upstream summary: An issue was discovered in ezXML 0.8.3 through 0.8.6. The function ezxml_decode, while […]

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How to Configure Hyper-V Checkpoints on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Hyper-V Checkpoints on Windows Server 2019

Introduction to Hyper-V Checkpoints on Windows Server 2019 Hyper-V Checkpoints (formerly called Snapshots) capture the state of a running virtual machine at a specific point in time, allowing you to revert the VM to that state if needed. This is invaluable before applying updates, making configuration changes, testing software installations, or performing any risky operation. […]

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SLES 15 — libsaml9 — vulnerability — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — libsaml9 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 November 2019 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2017:3234-1 (see also SUSE bugzilla) Related CVEs: CVE-2017-16853 Upstream summary: The DynamicMetadataProvider class in saml/saml2/metadata/impl/DynamicMetadataProvider.cpp in OpenSAML-C in OpenSAML before 2.6.1 fails to properly configure itself with the MetadataFilter plugins and does […]

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Oracle Linux 8 — mysql:8.0 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — mysql:8.0 — vulnerability — patch and remediation guide (ELSA-2019-2511)

🟠 High   ⏱ 15–60 min  Last verified: 7 November 2019 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-2511 Related CVEs: CVE-2019-2420 CVE-2019-2495 CVE-2019-2532 CVE-2019-2581 CVE-2019-2810 CVE-2019-2815 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 118562

Ubuntu 16.04 Nginx Returns 502 Bad Gateway with PHP-FPM

🟡 Medium   ⏱ 5–30 min  Last verified: 6 November 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 115569

RHEL 7 boots old kernel after yum update due to grub default mismatch

🟡 Medium   ⏱ 5–30 min  Last verified: 6 November 2019 Affected versions: RHEL 7 📖 ~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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