Common Problems

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

Debian 11 — kleopatra — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-24972 Upstream summary: The Kleopatra component before 3.1.12 (and before 20.07.80) for GnuPG allows remote attackers to execute arbitrary code because openpgp4fpr: URLs are supported without safe handling […]

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FreeBSD 13 — pavuk — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — pavuk — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 September 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: Pavuk HTTP Location header overflow Related CVEs: CVE-2004-0456 Upstream summary: When pavuk sends a request to a web server and the server sends back the HTTP status code 305 (Use […]

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Debian 11 — znc — multiple vulnerabilities (14 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — znc — multiple vulnerabilities (14 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 8 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-0759 CVE-2009-2658 CVE-2010-2488 CVE-2010-2812 CVE-2010-2934 CVE-2012-0033 CVE-2013-2130 CVE-2014-9403  +6 more Upstream summary: Multiple CRLF injection vulnerabilities in webadmin in ZNC before 0.066 allow remote authenticated users to modify […]

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Debian 11 — html5lib — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — html5lib — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 8 September 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2016-9909 CVE-2016-9910 Upstream summary: The serializer in html5lib before 0.99999999 might allow remote attackers to conduct cross-site scripting (XSS) attacks by leveraging mishandling of the < (less than) […]

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Arch Linux — grub — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Arch Linux

Arch Linux — grub — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read  •  Source: Arch ASA ASA-202106-43 Related CVEs: CVE-2021-20233 CVE-2021-20225 CVE-2020-27779 CVE-2020-27749 CVE-2020-25647 CVE-2020-25632 CVE-2020-14372 Upstream summary: Type: multiple issues. Status: Fixed. Affected: 2:2.04-10. Fixed in: 2:2.06-1. Group: AVG-1629. Table of contents Symptom & Impact […]

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Ubuntu 20.04 — linux-gcp-5.8 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — linux-gcp-5.8 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 8 September 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5050-1 Related CVEs: CVE-2020-26558 CVE-2021-0129 CVE-2021-28691 CVE-2021-3564 CVE-2021-3573 CVE-2021-38208 CVE-2021-23134 CVE-2021-32399  +12 more Upstream summary: It was discovered that the bluetooth subsystem in the Linux kernel did not properly perform […]

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Oracle Linux 8 — python3 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — python3 — vulnerability — patch and remediation guide (ELSA-2021-4057)

🟡 Medium   ⏱ 10–30 min  Last verified: 8 September 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4057 Related CVEs: CVE-2021-3733 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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Oracle Linux 8 — net-snmp — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — net-snmp — security and stability fixes — required update (ELSA-2020-5480)

🟠 High   ⏱ 15–60 min  Last verified: 7 September 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5480 Related CVEs: CVE-2020-15862 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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Common Problems 117559

Ubuntu 20.04 SSH service not starting

🟡 Medium   ⏱ 5–30 min  Last verified: 7 September 2021 📖 ~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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IBM AIX 7.2 — CVE-2021-29810 — xss — patch and remediation guide — diagnosis and fix on IBM AIX 7.2

IBM AIX 7.2 — CVE-2021-29810 — xss — patch and remediation guide

🟡 Medium   ⏱ 15–45 min  Last verified: 7 September 2021 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2021-29810, IBM Support Bulletin CVE: CVE-2021-29810 NVD summary: IBM Jazz for Service Management 1.1.3.10 and IBM Tivoli Netcool/OMNIbus_GUI is vulnerable to stored cross-site scripting. This vulnerability allows users to embed arbitrary JavaScript […]

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