Package Management

How to Enable Brotli and Gzip Compression in Nginx on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Enable Brotli and Gzip Compression in Nginx on RHEL 8

Compression reduces the byte size of HTTP responses, lowering bandwidth consumption and improving page load times. Nginx ships with built-in Gzip support through ngx_http_gzip_module, but Gzip has largely been superseded by Brotli for text content — the Brotli algorithm typically achieves 15–25% better compression ratios at equivalent CPU cost. On RHEL 8, Gzip requires only […]

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

Debian 11 — fontconfig — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 October 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2016-5384 Upstream summary: fontconfig before 2.12.1 does not validate offsets, which allows local users to trigger arbitrary free calls and consequently conduct double free attacks and execute arbitrary […]

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AlmaLinux 8 — webrtc-audio-processing — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — webrtc-audio-processing — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2020:4451 Related CVEs: CVE-2019-8625 CVE-2019-8710 CVE-2019-8720 CVE-2019-8743 CVE-2019-8764 CVE-2019-8766 CVE-2019-8769 CVE-2019-8771  +12 more Upstream summary: GNOME is the default desktop environment of AlmaLinux. The following packages have been upgraded to a later […]

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

Debian 11 — libpgf — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 October 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2015-6673 Upstream summary: Use-after-free vulnerability in Decoder.cpp in libpgf before 6.15.32. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution […]

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Debian 11 — lua-cgi — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — lua-cgi — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 October 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2014-2875 Upstream summary: The session.lua library in CGILua 5.2 alpha 1 and 5.2 alpha 2 uses weak session IDs generated based on OS time, which allows remote attackers […]

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Debian 11 — php-horde-ingo — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — php-horde-ingo — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 October 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-6275 Upstream summary: Multiple CSRF issues in Horde Groupware Webmail Edition 5.1.2 and earlier in basic.php. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis […]

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Ubuntu 16.04 — python-babel — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — python-babel — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 October 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4962-1 Related CVEs: CVE-2021-20095 Upstream summary: It was discovered that Babel incorrectly handled certain inputs. An attacker could possibly use this issue to execute arbitrary code. Table of contents Symptom […]

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Ubuntu 18.04 — abcm2ps — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — abcm2ps — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 5 October 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5961-1 Related CVEs: CVE-2018-10753 CVE-2018-10771 CVE-2019-1010069 CVE-2021-32434 CVE-2021-32435 CVE-2021-32436 Upstream summary: It was discovered that abcm2ps incorrectly handled memory when parsing specially crafted ABC files. An attacker could use this […]

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Oracle Linux 8 — go-toolset:ol8 — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — go-toolset:ol8 — security and stability fixes — required update (ELSA-2022-5337)

🟡 Medium   ⏱ 10–30 min  Last verified: 4 October 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-5337 Related CVEs: CVE-2022-29526 CVE-2022-28327 CVE-2022-24675 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 114995

Cockpit Web Console Not Reachable on Port 9090

🟡 Medium   ⏱ 5–30 min  Last verified: 4 October 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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