Linux

Debian 11 — golang-yaml.v2 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — golang-yaml.v2 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 June 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-4235 CVE-2022-3064 Upstream summary: Due to unbounded alias chasing, a maliciously crafted YAML file can cause the system to consume significant system resources. If parsing user input, this […]

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How to Tune Kernel Parameters with sysctl on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Tune Kernel Parameters with sysctl on Debian 11

Introduction How to Tune Kernel Parameters with sysctl 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 […]

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Debian 11 — lilypond — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — lilypond — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 June 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-17523 CVE-2018-10992 CVE-2020-17353 CVE-2020-17354 Upstream summary: lilypond-invoke-editor in LilyPond 2.19.80 does not validate strings before launching the program specified by the BROWSER environment variable, which allows remote attackers […]

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Debian 11 — flex — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — flex — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 June 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2006-0459 CVE-2010-0634 CVE-2016-6354 CVE-2019-6293 Upstream summary: flex.skl in Will Estes and John Millaway Fast Lexical Analyzer Generator (flex) before 2.5.33 does not allocate enough memory for grammars containing […]

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Debian 11 — giflib — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — giflib — multiple vulnerabilities (17 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 June 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-2974 CVE-2005-3350 CVE-2015-7555 CVE-2016-3177 CVE-2016-3977 CVE-2018-11489 CVE-2018-11490 CVE-2019-15133  +9 more Upstream summary: libungif library before 4.1.0 allows attackers to cause a denial of service via a crafted GIF […]

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

Oracle Linux 8 — firefox — vulnerability — patch and remediation guide (ELSA-2022-7024)

🟠 High   ⏱ 15–60 min  Last verified: 15 June 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-7024 Related CVEs: CVE-2022-40674 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 — python2-paramiko — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — python2-paramiko — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 15 June 2022 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2019:0174-1 (see also SUSE bugzilla) Related CVEs: CVE-2018-1000805 CVE-2018-7750 CVE-2022-24302 Upstream summary: Paramiko version 2.4.1, 2.3.2, 2.2.3, 2.1.5, 2.0.8, 1.18.5, 1.17.6 contains a Incorrect Access Control vulnerability in SSH server that can […]

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SLES 15 — samba — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — samba — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 15 June 2022 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2023:0019-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-44640 CVE-2009-1886 CVE-2020-17049 CVE-2010-3069 CVE-2012-0870 CVE-2012-1182 CVE-2013-4408 CVE-2015-8467  +12 more Upstream summary: Heimdal before 7.7.1 allows remote attackers to execute arbitrary code because of an […]

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How to Install Nginx on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Nginx on RHEL 7

How to Install Nginx on RHEL 7 Nginx is a high-performance, open-source web server and reverse proxy known for its speed, stability, and low memory footprint. On Red Hat Enterprise Linux 7, Nginx is not available in the default repositories, so you must either enable the EPEL (Extra Packages for Enterprise Linux) repository or configure […]

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Common Problems 117085

Ubuntu 22.04 LTS – PHP-FPM pool crashes from low memory limits – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 15 June 2022 Affected versions: Ubuntu 22.04 LTS 📖 ~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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