April 2022 - Page 62 of 70

Common Problems 120489

Debian 11 APT Update Fails with NO_PUBKEY Errors

🟡 Medium   ⏱ 5–30 min  Last verified: 19 May 2026 Affected versions: Debian 11 📖 ~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 Configure LVM on SLES 12 — step-by-step SUSE Linux Enterprise 12 tutorial on Progressive Robot

How to Configure LVM on SLES 12

Introduction This tutorial covers How to Configure LVM on SLES 12 on SLES 12. SLES 12 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Step 1 — Install LVM zypper install -y lvm2 Step 2 — Create […]

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Debian 11 — apcupsd — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — apcupsd — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0098 CVE-2003-0099 Upstream summary: Unknown vulnerability in apcupsd before 3.8.6, and 3.10.x before 3.10.5, allows remote attackers to gain root privileges, possibly via format strings in a request […]

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

Debian 11 — petris — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-3540 Upstream summary: Buffer overflow in petris before 1.0.1 allows remote attackers to execute arbitrary code via unspecified attack vectors. Table of contents Symptom & Impact Environment & […]

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Debian 11 — arc — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — arc — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-2945 CVE-2005-2992 CVE-2015-9275 Upstream summary: arc 5.21j and earlier create temporary files with world-readable permissions, which allows local users to read sensitive information from files created by (1) […]

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

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

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0962 CVE-2004-0426 CVE-2004-0792 CVE-2004-2093 CVE-2006-2083 CVE-2007-4091 CVE-2007-6199 CVE-2007-6200  +12 more Upstream summary: Heap-based buffer overflow in rsync before 2.5.7, when running in server mode, allows remote attackers to […]

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Common Problems 116040

Ubuntu 26.04 LTS /boot Partition Full Prevents Kernel Updates

🟠 High   ⏱ 5–30 min  Last verified: 20 May 2026 Affected versions: Ubuntu 26.04 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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How to Set Up Riemann Event Stream Processor on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Set Up Riemann Event Stream Processor on Debian 9

Introduction This guide explains how to Set Up Riemann Event Stream Processor on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install […]

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Ubuntu 20.04 — linuxptp — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — linuxptp — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6097-1 Related CVEs: CVE-2021-3570 Upstream summary: It was discovered that Linux PTP did not properly perform a length check when forwarding a PTP message between ports. A remote attacker could […]

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SLES 15 — ppp — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — ppp — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2020:0489-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-8597 CVE-2022-4603 CVE-2014-3158 CVE-2015-3310 Upstream summary: eap.c in pppd in ppp 2.4.2 through 2.4.8 has an rhostname buffer overflow in the eap_request and eap_response functions. […]

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