Linux

Ubuntu 16.04 — paramiko — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — paramiko — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 7 June 2023 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5351-2 Related CVEs: CVE-2022-24302 CVE-2018-1000805 CVE-2018-7750 Upstream summary: USN-5351-1 fixed a vulnerability in Paramiko. This update provides the corresponding update for Ubuntu 16.04 ESM. Original advisory details: Jan Schejbal discovered […]

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Oracle Linux 9 — haproxy — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — haproxy — vulnerability — patch and remediation guide (ELSA-2023-1696)

🟡 Medium   ⏱ 10–30 min  Last verified: 7 June 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-1696 Related CVEs: CVE-2023-25725 CVE-2023-0056 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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How to Tune Linux Kernel Parameters with sysctl on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Tune Linux Kernel Parameters with sysctl on RHEL 8

Linux kernel parameters control how your system allocates resources, handles network connections, and manages memory. On RHEL 8, the sysctl utility provides a clean interface for reading and writing these parameters at runtime, while drop-in configuration files under /etc/sysctl.d/ make changes persistent across reboots. Properly tuned kernel parameters can significantly improve throughput, reduce latency, and […]

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openSUSE Tumbleweed — python39-cmarkgfm — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python39-cmarkgfm — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE security advisory (see also SUSE bugzilla) Related CVEs: CVE-2023-37463 Upstream summary: cmark-gfm is an extended version of the C reference implementation of CommonMark, a rationalized version of Markdown syntax with a spec. Three […]

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Gentoo Linux — app-arch/rar — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — app-arch/rar — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202309-04 Related CVEs: CVE-2022-30333 CVE-2023-40477 Upstream summary: Due to an error in the validation of symbolic links within archives, RAR and UnRAR can potentially write files to a directory which is outside […]

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Ubuntu 22.04 — openldap — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — openldap — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 June 2023 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6616-1 Related CVEs: CVE-2023-2953 CVE-2022-29155 Upstream summary: It was discovered that OpenLDAP was not properly performing bounds checks when executing functions related to LDAP URLs. An attacker could possibly use […]

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Ubuntu 20.04 — php-cas — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — php-cas — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 June 2023 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6913-1 Related CVEs: CVE-2022-39369 Upstream summary: Filip Hejsek discovered that phpCAS was using HTTP headers to determine the service URL used to validate tickets. A remote attacker could possibly use […]

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Ubuntu 16.04 — freeradius — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — freeradius — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 6 June 2023 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5785-1 Related CVEs: CVE-2019-17185 CVE-2022-41860 CVE-2022-41861 CVE-2017-10978 CVE-2017-10979 CVE-2017-10980 CVE-2017-10981 CVE-2017-10982  +5 more Upstream summary: It was discovered that FreeRADIUS incorrectly handled multiple EAP-pwd handshakes. An attacker could possibly use […]

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Ubuntu 20.04 — node-hawk — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — node-hawk — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 June 2023 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6116-1 Related CVEs: CVE-2022-29167 Upstream summary: It was discovered that hawk incorrectly handled certain inputs. If a user or an automated system were tricked into opening a specially crafted input […]

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