ubuntu

Ubuntu 22.04 — libhttp-daemon-perl — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — libhttp-daemon-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 February 2023 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5520-1 Related CVEs: CVE-2022-31081 Upstream summary: It was discovered that HTTP-Daemon incorrectly handled certain crafted requests. A remote attacker could possibly use this issue to perform an HTTP Request Smuggling […]

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Common Problems 119073

Ubuntu 14.04 LTS swap not activating at boot

🟡 Medium   ⏱ 5–30 min  Last verified: 19 February 2023 📖 ~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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Common Problems 118494

Ubuntu 16.04 LTS sudo command fails due to corrupted /etc/sudoers

🔴 Critical   ⏱ 5–30 min  Last verified: 19 February 2023 Affected versions: 16.04 📖 ~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 […]

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Common Problems 117617

Ubuntu 20.04 LTS – cron jobs fail silently due to environment path mismatch – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 19 February 2023 Affected versions: Ubuntu 20.04 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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Ubuntu 16.04 — exo — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — exo — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 19 February 2023 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6008-1 Related CVEs: CVE-2022-32278 Upstream summary: It was discovered that Exo did not properly sanitized desktop files. A remote attacker could possibly use this issue to to cause a crash […]

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

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

🟢 Low   ⏱ 5–15 min  Last verified: 18 February 2023 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7349-1 Related CVEs: CVE-2022-30333 CVE-2023-40477 Upstream summary: It was discovered that RAR incorrectly handled certain paths. If a user or automated system were tricked into extracting a specially crafted RAR […]

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Ubuntu 22.04 — plantuml — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — plantuml — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 February 2023 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7353-1 Related CVEs: CVE-2022-1231 Upstream summary: Tobias S. Fink discovered that PlantUML was susceptible to cross-site scripting attacks (XSS) in instances where SVG images were rendered. An attacker could possibly […]

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Ubuntu 20.04 — h2o — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — h2o — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 February 2023 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7892-1 Related CVEs: CVE-2023-44487 Upstream summary: It was discovered that H2O exhibited poor server resource management in its HTTP/2 protocol. An attacker could possibly use this issue to cause H2O […]

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Ubuntu 22.04 — linux-gcp-6.2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — linux-gcp-6.2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 18 February 2023 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6635-1 Related CVEs: CVE-2023-37453 CVE-2023-39189 CVE-2023-39192 CVE-2023-39193 CVE-2023-42754 CVE-2023-5158 CVE-2023-5178 CVE-2023-5717  +12 more Upstream summary: It was discovered that the USB subsystem in the Linux kernel contained a race condition […]

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Ubuntu 18.04 — mod-wsgi — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — mod-wsgi — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 February 2023 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5551-1 Related CVEs: CVE-2022-2255 Upstream summary: It was discovered that mod-wsgi did not correctly remove the X-Client-IP header when processing requests from untrusted proxies. A remote attacker could use this […]

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