Linux

Debian 11 — zeromq3 — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — zeromq3 — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 31 August 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2014-7202 CVE-2014-7203 CVE-2014-9721 CVE-2019-13132 CVE-2019-6250 CVE-2020-15166 CVE-2021-20234 CVE-2021-20235  +2 more Upstream summary: stream_engine.cpp in libzmq (aka ZeroMQ/C++)) 4.0.5 before 4.0.5 allows man-in-the-middle attackers to conduct downgrade attacks via […]

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Debian 11 — netcdf — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — netcdf — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 31 August 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker 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  +12 more Upstream summary: An issue was discovered in ezXML 0.8.3 through 0.8.6. The function ezxml_decode, while parsing a crafted […]

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Debian 11 — notmuch — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — notmuch — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 31 August 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-1103 Upstream summary: emacs/notmuch-mua.el in Notmuch before 0.11.1, when using the Emacs interface, allows user-assisted remote attackers to read arbitrary files via crafted MML tags, which are not […]

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Oracle Linux 8 — gstreamer1-plugins-good — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — gstreamer1-plugins-good — vulnerability — patch and remediation guide (ELSA-2022-7618)

🟡 Medium   ⏱ 10–30 min  Last verified: 31 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7618 Related CVEs: CVE-2021-3497 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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Gentoo Linux — app-text/gocr — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — app-text/gocr — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202401-28 Related CVEs: CVE-2021-33479 CVE-2021-33480 CVE-2021-33481 Upstream summary: Multiple vulnerabilities have been discovered in GOCR. Please review the CVE identifiers referenced below for details. Table of contents Symptom & Impact Environment & […]

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How to Configure VLAN Tagging with 802.1Q on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Configure VLAN Tagging with 802.1Q on RHEL 7

How to Configure VLAN Tagging with 802.1Q on RHEL 7 VLANs (Virtual Local Area Networks) allow a single physical network interface to participate in multiple logically isolated network segments simultaneously. The 802.1Q standard defines how Ethernet frames are tagged with a 12-bit VLAN ID, enabling switches and hosts to segregate traffic without requiring dedicated physical […]

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Oracle Linux 8 — p11-kit security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — p11-kit security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-1609)

🟡 Medium   ⏱ 10–30 min  Last verified: 30 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1609 Related CVEs: CVE-2020-29362 CVE-2020-29363 CVE-2020-29361 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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Common Problems 118943

Ubuntu 14.04 LTS enters grub rescue prompt

🟡 Medium   ⏱ 5–30 min  Last verified: 30 August 2021 📖 ~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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