Linux

Ubuntu 18.04 — wheel — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — wheel — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 12 January 2023 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5821-1 Related CVEs: CVE-2022-40898 Upstream summary: Sebastian Chnelik discovered that wheel incorrectly handled certain file names when validated against a regex expression. An attacker could possibly use this issue to […]

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

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

🟢 Low   ⏱ 5–15 min  Last verified: 11 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0581 CVE-2003-0625 Upstream summary: X Fontserver for Truetype fonts (xfstt) 1.4 allows remote attackers to cause a denial of service and possibly execute arbitrary code via a (1) […]

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Common Problems 117106

Ubuntu 22.04 Black Screen After Resume from Suspend

🟡 Medium   ⏱ 5–30 min  Last verified: 11 January 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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Debian 11 — mafft — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — mafft — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-4971 Upstream summary: mafft-homologs in mafft 6.240 allows local users to overwrite arbitrary files via a symlink attack on (1) /tmp/_vf#?????, (2) /tmp/_if#?????, (3) /tmp/_pf#?????, (4) /tmp/_af#?????, (5) […]

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

Debian 11 — libphysfs — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 11 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2005-2096 Upstream summary: zlib 1.2 and later versions allows remote attackers to cause a denial of service (crash) via a crafted compressed stream with an incomplete code description […]

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Debian 11 — adns — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — adns — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 11 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-1447 CVE-2008-4100 CVE-2017-9103 CVE-2017-9104 CVE-2017-9105 CVE-2017-9106 CVE-2017-9107 CVE-2017-9108  +1 more Upstream summary: The DNS protocol, as implemented in (1) BIND 8 and 9 before 9.5.0-P1, 9.4.2-P1, and 9.3.5-P1; […]

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

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

🟡 Medium   ⏱ 10–30 min  Last verified: 11 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-1987 CVE-2016-7949 CVE-2016-7950 Upstream summary: Multiple integer overflows in X.org libXrender 0.9.7 and earlier allow X servers to trigger allocation of insufficient memory and a buffer overflow via […]

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How To Use Nmap to Scan for Open Ports — step-by-step Linux tutorial on Progressive Robot

How To Use Nmap to Scan for Open Ports

Nmap is a great tool for discovering the network services and ports that your server is exposing to the network. In this guide, we will discuss some basic information about networking ports and how you can use nmap to find your weaknesses.

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