Common Problems

Common Problems 117905

Ubuntu 18.04 LTS – dist-upgrade aborts with held broken packages

🟠 High   ⏱ 5–30 min  Last verified: 18 October 2021 Affected versions: Ubuntu 18.04 LTS Ubuntu 18.04 Ubuntu 18.04.6 📖 ~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 […]

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Debian 11 — ruby-redcarpet — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — ruby-redcarpet — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 October 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-26298 Upstream summary: Redcarpet is a Ruby library for Markdown processing. In Redcarpet before version 3.5.1, there is an injection vulnerability which can enable a cross-site scripting attack. […]

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openSUSE Tumbleweed — libnm0 — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — libnm0 — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory SUSE-SA:2011:045 (see also SUSE bugzilla) Related CVEs: CVE-2006-7246 CVE-2015-2924 CVE-2018-1000135 CVE-2020-10754 CVE-2021-20297 CVE-2016-0764 Upstream summary: NetworkManager 0.9.x does not pin a certificate's subject to an ESSID when 802.11X authentication is used. Table […]

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

Debian 11 — kmail — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 October 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-11880 Upstream summary: An issue was discovered in KDE KMail before 19.12.3. By using the proprietary (non-RFC6068) "mailto?attach=…" parameter, a website (or other source of mailto links) can […]

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

Ubuntu 20.04 — libzen — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 October 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6048-1 Related CVEs: CVE-2020-36646 Upstream summary: It was discovered that ZenLib doesn't check the return value of a specific operation before using it. An attacker could use a specially crafted […]

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Ubuntu 20.04 — libgcrypt20 — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — libgcrypt20 — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 18 October 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5080-1 Related CVEs: CVE-2021-33560 CVE-2021-40528 Upstream summary: It was discovered that Libgcrypt incorrectly handled ElGamal encryption. An attacker could possibly use this issue to recover sensitive information. Table of contents […]

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openSUSE Tumbleweed — python36 — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — python36 — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:0931-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-14422 CVE-2020-27619 CVE-2014-2667 CVE-2018-20406 CVE-2021-3426 Upstream summary: Lib/ipaddress.py in Python through 3.8.3 improperly computes hash values in the IPv4Interface and IPv6Interface classes, which might allow […]

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

Oracle Linux 8 — openssl — vulnerability — patch and remediation guide (ELSA-2021-9561)

🟡 Medium   ⏱ 10–30 min  Last verified: 18 October 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9561 Related CVEs: CVE-2021-23841 CVE-2021-23840 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

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

Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide (ELSA-2021-4130)

🟠 High   ⏱ 15–60 min  Last verified: 18 October 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4130 Related CVEs: CVE-2021-38506 CVE-2021-38504 CVE-2021-38503 CVE-2021-38507 CVE-2021-38509 CVE-2021-38508 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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