Package Management

Ubuntu 16.04 — klibc — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — klibc — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 28 April 2023 Affected versions: Ubuntu 16.04 (xenial) 📖 ~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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Ubuntu 18.04 — htmlunit — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — htmlunit — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 28 April 2023 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-8220-1 Related CVEs: CVE-2023-49093 Upstream summary: It was discovered that HtmlUnit was vulnerable to remote code execution via XSLT when browsing an attacker-controlled webpage. An attacker could possibly use this […]

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Windows Server 2016 — KB5028167 — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Windows Server 2016

Windows Server 2016 — KB5028167 — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5028167 • MSRC update-guide entry Related CVEs: CVE-2023-32046 CVE-2023-35336 CVE-2023-35308 Affected components: Windows Server 2016 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution […]

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Ubuntu 14.04 — exim4 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 14.04

Ubuntu 14.04 — exim4 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 28 April 2023 Affected versions: Ubuntu 14.04 (trusty) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6881-1 Related CVEs: CVE-2021-38371 CVE-2023-42117 CVE-2023-42119 CVE-2023-42114 CVE-2023-42115 CVE-2023-42116 CVE-2022-37452 CVE-2020-28007  +12 more Upstream summary: It was discovered that Exim did not enforce STARTTLS sync point on client side. An […]

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Amazon Linux 2 — xmlrpc-c — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — xmlrpc-c — vulnerability — patch and remediation guide

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2022-1795 Related CVEs: CVE-2022-25235 Upstream summary: A flaw was found in expat. Passing malformed 2- and 3-byte UTF-8 sequences (for example, from start tag names) to the XML processing application […]

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CentOS Stream 9 — fribidi — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on CentOS Stream 9

CentOS Stream 9 — fribidi — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 28 April 2023 Affected versions: CentOS Stream 9 📖 ~4 min read  •  Source: AlmaLinux/RHEL advisory ALSA-2022:8011 Related CVEs: CVE-2022-25308 CVE-2022-25309 CVE-2022-25310 Upstream summary: FriBidi is a library to handle bidirectional scripts (for example Hebrew, Arabic), so that the display is done in the proper way, while […]

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Oracle Linux 9 — samba security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — samba security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2022-8317)

🟡 Medium   ⏱ 10–30 min  Last verified: 27 April 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2022-8317 Related CVEs: CVE-2022-32742 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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Debian 11 — snappy-java — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — snappy-java — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 27 April 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2023-43642 Upstream summary: snappy-java is a Java port of the snappy, a fast C++ compresser/decompresser developed by Google. The SnappyInputStream was found to be vulnerable to Denial of […]

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Common Problems 118418

Release File Expired or Not Yet Valid

🟡 Medium   ⏱ 5–30 min  Last verified: 27 April 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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