Common Problems

Debian 11 — php-horde-data — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — php-horde-data — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 November 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-8518 Upstream summary: Horde Groupware Webmail Edition 5.2.22 allows injection of arbitrary PHP code via CSV data, leading to remote code execution. Table of contents Symptom & Impact […]

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Debian 11 — ruby-omniauth — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — ruby-omniauth — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 20 November 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2015-9284 CVE-2017-18076 CVE-2020-36599 Upstream summary: The request phase of the OmniAuth Ruby gem (1.9.1 and earlier) is vulnerable to Cross-Site Request Forgery when used as part of the […]

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Debian 11 — revelation — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — revelation — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 20 November 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-2742 CVE-2012-2743 CVE-2012-3818 Upstream summary: Revelation 0.4.13-2 and earlier uses only the first 32 characters of a password followed by a sequence of zeros, which reduces the entropy […]

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

Debian 11 — openpyxl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 20 November 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-5992 Upstream summary: Openpyxl 2.4.1 resolves external entities by default, which allows remote attackers to conduct XXE attacks via a crafted .xlsx document. Table of contents Symptom & […]

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Debian 11 — software-properties — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — software-properties — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 20 November 2021 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-4407 CVE-2012-0955 CVE-2013-1061 CVE-2020-15709 Upstream summary: ppa.py in Software Properties before 0.81.13.3 does not validate the server certificate when downloading PPA GPG key fingerprints, which allows man-in-the-middle (MITM) […]

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Ubuntu 20.04 — dojo — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — dojo — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 20 November 2021 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7569-1 Related CVEs: CVE-2021-23450 CVE-2020-4051 CVE-2019-10785 CVE-2018-15494 Upstream summary: It was discovered that Dojo did not correctly handle DataGrids. An attacker could possibly use this issue to execute arbitrary code. […]

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

Oracle Linux 8 — freerdp — vulnerability — patch and remediation guide (ELSA-2021-4622)

🟠 High   ⏱ 15–60 min  Last verified: 20 November 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4622 Related CVEs: CVE-2021-41160 CVE-2021-41159 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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FreeBSD 13 — wireshark-qt — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — wireshark-qt — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 20 November 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: wireshark — multiple security issues Related CVEs: CVE-2015-6241 CVE-2015-6242 CVE-2015-6243 CVE-2015-6244 CVE-2015-6245 CVE-2015-6246 CVE-2015-6247 CVE-2015-6248  +12 more Upstream summary: wireshark developers reports: wnpa-sec-2018-05. IEEE 802.11 dissector crash. (CVE-2018-7335) wnpa-sec-2018-06. Large […]

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Oracle Linux 8 — userspace graphics, xorg-x11, and mesa security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — userspace graphics, xorg-x11, and mesa security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-1804)

🟡 Medium   ⏱ 10–30 min  Last verified: 19 November 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-1804 Related CVEs: CVE-2020-14347 CVE-2020-25712 CVE-2020-14344 CVE-2020-14362 CVE-2020-14345 CVE-2020-14360 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Alpine Linux edge — hostapd — multiple vulnerabilities (16 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — hostapd — multiple vulnerabilities (16 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 2.9-r3 📖 ~4 min read  •  Source: Alpine secdb entry — hostapd 2.9-r3 Related CVEs: CVE-2021-30004 CVE-2020-12695 CVE-2019-16275 CVE-2019-11555 CVE-2019-9496 CVE-2017-13077 CVE-2017-13078 CVE-2017-13079  +8 more Upstream summary: Alpine main repository for vedge ships hostapd 2.9-r3 which […]

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