Ubuntu 20 .04にPostfixをインストールして設定 する方法
Postfixは人気のあるオープンソースのメール転送エージェント（Mail Transfer Agent: MTA）であり、Linuxシステムで電子メールのルーティングや配信に使用できます。インターネット上のパブリックメールサーバーの約25％がPostfixを実行していると推定されます。このガイドでは、Ubuntu 20.04サーバーにPostfixをインストールして設定する方法を学びます。
Ubuntu 20.04 — google-guest-agent — multiple vulnerabilities (2 CVEs) — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 18 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7956-1 Related CVEs: CVE-2025-58181 CVE-2024-45337 Upstream summary: Jakub Ciolek discovered that the Go Cryptography module included in Google Guest Agent did not validate GSSAPI authentication requests during SSH operations. An […]
Ubuntu 20.04 — glibc — multiple vulnerabilities (20 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 18 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8005-1 Related CVEs: CVE-2026-0915 CVE-2025-8058 CVE-2025-15281 CVE-2026-0861 CVE-2025-4802 CVE-2025-0395 CVE-2024-33599 CVE-2024-33600 +12 more Upstream summary: Vitaly Simonovich discovered that the GNU C Library did not properly initialize the input when […]
Ubuntu 20.04 — rust-tar — vulnerability — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 13 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8138-2 Related CVEs: CVE-2026-33056 Upstream summary: USN-8138-1 fixed a vulnerability in tar-rs. This update provides the corresponding update for Ubuntu 20.04 LTS. Original advisory details: It was discovered that tar-rs […]
Ubuntu 20.04 — restrictedpython — multiple vulnerabilities (4 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 11 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7355-1 Related CVEs: CVE-2023-37271 CVE-2023-41039 CVE-2024-47532 CVE-2025-22153 Upstream summary: Nakul Choudhary and Robert Xiao discovered that RestrictedPython did not properly sanitize certain inputs. An attacker could possibly use this issue […]
Ubuntu 20.04 — postgresql-12 — multiple vulnerabilities (20 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 11 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7520-1 Related CVEs: CVE-2025-4207 CVE-2025-1094 CVE-2024-10976 CVE-2024-10977 CVE-2024-10978 CVE-2024-10979 CVE-2024-7348 CVE-2024-0985 +12 more Upstream summary: It was discovered that PostgreSQL incorrectly handled the GB18030 encoding. An attacker could possibly use […]
Ubuntu 20.04 — angular.js — multiple vulnerabilities (10 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 11 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7958-1 Related CVEs: CVE-2024-8372 CVE-2019-14863 CVE-2025-0716 CVE-2023-26117 CVE-2024-8373 CVE-2025-2336 CVE-2024-21490 CVE-2023-26116 +2 more Upstream summary: It was discovered that AngularJS did not properly sanitize certain `xlink:href` attributes. A remote attacker […]
Ubuntu 20.04 — glance — multiple vulnerabilities (3 CVEs) — patch and remediation guide
🟡 Medium ⏱ 10–30 min Last verified: 10 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8199-1 Related CVEs: CVE-2026-34881 CVE-2024-32498 CVE-2022-47951 Upstream summary: Martin Kaesberger discovered that OpenStack Glance's image processing could return the contents of arbitrary files. An attacker could possibly use this issue […]
Ubuntu 20.04 — binutils — multiple vulnerabilities (20 CVEs) — patch and remediation guide
🟠 High ⏱ 15–60 min Last verified: 10 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-7919-1 Related CVEs: CVE-2025-11495 CVE-2025-11081 CVE-2025-11083 CVE-2025-11412 CVE-2025-11082 CVE-2025-11413 CVE-2025-11414 CVE-2025-11494 +12 more Upstream summary: It was discovered that GNU binutils' dump_dwarf_section function could be manipulated to perform an out-of-bounds […]
Ubuntu 20.04 — python-marshmallow — multiple vulnerabilities (2 CVEs) — patch and remediation guide
🟢 Low ⏱ 5–15 min Last verified: 7 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read • Source: Ubuntu Security Notice USN-8225-1 Related CVEs: CVE-2025-68480 CVE-2018-17175 Upstream summary: Jared Deckard discovered that Python marshmallow did not correctly handle hiding certain fields. An attacker could possibly use this issue to leak sensitive […]
