Common Problems

Oracle Linux 8 — cups — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — cups — security and stability fixes — required update (ELSA-2023-7165)

🟡 Medium   ⏱ 10–30 min  Last verified: 5 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-7165 Related CVEs: CVE-2023-32324 CVE-2023-34241 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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Common Problems 113615

Windows Server 2012 R2 — TLS cipher suite hardening breaks legacy API integrations on internal services — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 5 April 2021 Affected versions: Windows Server 2012 R2 📖 ~2 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 […]

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AlmaLinux 8 — gtk2 — multiple vulnerabilities (12 CVEs) — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — gtk2 — multiple vulnerabilities (12 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:1586 Related CVEs: CVE-2019-13012 CVE-2020-13543 CVE-2020-13584 CVE-2020-16125 CVE-2020-9948 CVE-2020-9951 CVE-2020-9983 CVE-2021-1817  +4 more Upstream summary: GNOME is the default desktop environment of AlmaLinux. The following packages have been upgraded to a later […]

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FreeBSD 12 — coturn — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — coturn — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 April 2021 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: coturn — information leakage Related CVEs: CVE-2020-4067 Upstream summary: Felix Dörre reports: The issue is that STUN/TURN response buffer is not initialized properly. (CWE 665) This is a leak of […]

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

Ubuntu 20.04 — awl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 April 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4539-1 Related CVEs: CVE-2020-11728 Upstream summary: Andrew Bartlett discovered that DAViCal Andrew's Web Libraries (AWL) did not properly manage session keys. An attacker could possibly use this issue to impersonate […]

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Alpine Linux edge — newlib — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — newlib — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 4.1.0-r0 📖 ~4 min read  •  Source: Alpine secdb entry — newlib 4.1.0-r0 Related CVEs: CVE-2021-3420 Upstream summary: Alpine community repository for vedge ships newlib 4.1.0-r0 which addresses CVE-2021-3420. Table of contents Symptom & Impact Environment […]

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Ubuntu 18.04 — salt — multiple vulnerabilities (17 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — salt — multiple vulnerabilities (17 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 5 April 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6948-1 Related CVEs: CVE-2020-16846 CVE-2020-17490 CVE-2020-25592 CVE-2020-28243 CVE-2020-28972 CVE-2020-35662 CVE-2021-25281 CVE-2021-25282  +9 more Upstream summary: It was discovered that Salt incorrectly handled crafted web requests. A remote attacker could possibly […]

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Gentoo Linux — net-dns/pdns — vulnerability — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — net-dns/pdns — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202012-18 Related CVEs: CVE-2020-17482 Upstream summary: It was discovered that PowerDNS did not properly handle certain unknown records. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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Ubuntu 16.04 — mc — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 16.04

Ubuntu 16.04 — mc — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 5 April 2021 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5160-1 Related CVEs: CVE-2021-36370 Upstream summary: It was discovered that Midnight Commander would not check server fingerprints when establishing an SFTP connection. If a remote attacker were able to intercept […]

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SLES 12 — stunnel — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on SLES 12

SLES 12 — stunnel — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 5 April 2021 Affected versions: SLES 12 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2021:0772-1 (see also SUSE bugzilla) Related CVEs: CVE-2021-20230 CVE-2013-1762 CVE-2011-2940 CVE-2014-0016 CVE-2015-3644 Upstream summary: A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured […]

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CHAT