Operations

Ubuntu 20.04 — klibc — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — klibc — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 20 October 2022 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7959-1 Related CVEs: CVE-2016-9843 CVE-2016-9840 CVE-2016-9841 CVE-2018-25032 CVE-2022-37434 CVE-2021-31870 CVE-2021-31871 CVE-2021-31872  +1 more Upstream summary: It was discovered that zlib, vendored in klibc, did not properly handle integer arithmetic. An […]

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How to Configure Nginx as a TCP/UDP Load Balancer on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Configure Nginx as a TCP/UDP Load Balancer on FreeBSD 12

Introduction This guide explains how to Configure Nginx as a TCP/UDP Load Balancer on FreeBSD 12 on FreeBSD 12. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and […]

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Ubuntu 20.04 — libbpf — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libbpf — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 October 2022 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5759-2 Related CVEs: CVE-2022-3534 CVE-2022-3606 Upstream summary: USN-5759-1 fixed vulnerabilities in LibBPF. This update provides the corresponding updates for Ubuntu 20.04 ESM. Original advisory details: It was discovered that LibBPF […]

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Oracle Linux 8 — postgresql:12 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — postgresql:12 — vulnerability — patch and remediation guide (ELSA-2022-4807)

🟠 High   ⏱ 15–60 min  Last verified: 20 October 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-4807 Related CVEs: CVE-2022-1552 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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How to Install Rust with rustup on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install Rust with rustup on Debian 11

Introduction How to Install Rust with rustup 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 11. […]

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IBM AIX 7.3 — CVE-2021-38933 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.3

IBM AIX 7.3 — CVE-2021-38933 — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 19 October 2022 Affected versions: IBM AIX 7.3 📖 ~4 min read  •  Source: NVD CVE-2021-38933, IBM Support Bulletin CVE: CVE-2021-38933 NVD summary: IBM Sterling Connect:Direct for UNIX 1.5 uses weaker than expected cryptographic algorithms that could allow an attacker to decrypt highly sensitive information. IBM X-Force […]

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Common Problems 121578

OOM Killer Terminating Critical Application Processes

🔴 Critical   ⏱ 5–30 min  Last verified: 19 October 2022 Affected versions: Debian 9 📖 ~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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How to Install and Use Podman with Buildah on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install and Use Podman with Buildah on RHEL 9

Buildah is a daemonless, rootless command-line tool for building OCI-compliant container images — without requiring a running Docker daemon or root privileges. On RHEL 9, Buildah ships as a first-class tool alongside Podman, and the two integrate tightly: images built with Buildah appear immediately in Podman’s local image store. Buildah’s fine-grained API lets you build […]

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FreeBSD 13 — element-web — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — element-web — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 19 October 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: element-web — several vulnerabilities Related CVEs: CVE-2021-40823 CVE-2021-40824 CVE-2022-36059 CVE-2022-36060 CVE-2022-39236 CVE-2022-39249 CVE-2022-39250 CVE-2022-39251  +8 more Upstream summary: Element team reports: Versions of Element Web and Desktop earlier than 1.11.85 […]

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FreeBSD 13 — py310-django-photologue — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — py310-django-photologue — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 October 2022 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: py-django-photologue — XSS vulnerability Related CVEs: CVE-2022-4526 Upstream summary: domiee13 reports: A vulnerability was found in django-photologue up to 3.15.1 and classified as problematic. Affected by this issue is some […]

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