August 2021 - Page 11 of 69

FreeBSD 13 — libsndfile — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — libsndfile — multiple vulnerabilities (20 CVEs) — patch and remediation guide

  • August 27, 2021
  • BSD
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🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: libsndfile_project — Integer overflow in dataend calculation Related CVEs: CVE-2009-0186 CVE-2009-1788 CVE-2009-1791 CVE-2011-2696 CVE-2017-12562 CVE-2017-14245 CVE-2017-14246 CVE-2017-14634  +12 more Upstream summary: [email protected] reports: Multiple signed integers overflow in function au_read_header […]

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FreeBSD 13 — hanemacs — vulnerability — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — hanemacs — vulnerability — patch and remediation guide

  • August 27, 2021
  • BSD
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🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: emacs — movemail format string vulnerability Related CVEs: CVE-2005-0100 Upstream summary: Max Vozeler discovered several format string vulnerabilities in the movemail utility of Emacs. They can be exploited when connecting […]

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How to Install Ansible on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install Ansible on FreeBSD 13

  • August 27, 2021
  • FreeBSD
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Introduction How to Install Ansible on FreeBSD 13 is a core administration task for any FreeBSD 13 server operator. FreeBSD 13 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet filtering, and […]

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Настройка ключей SSH в Ubuntu 16.04 — step-by-step Linux tutorial on Progressive Robot

Настройка ключей SSH в Ubuntu 16.04

  • August 27, 2021
  • Linux
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SSH или защищенная оболочка — это шифрованный протокол, используемый для администриования и связи с серверами. При работе с сервером Ubuntu вы проведете больше всего времени в сеансах терминала с подключением к серверу через SSH. В этом обучающем модуле мы расскажем о настройке…

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

Debian 11 — liece — vulnerability — patch and remediation guide

  • August 27, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0537 Upstream summary: The liece Emacs IRC client 2.0+0.20030527 and earlier creates temporary files insecurely, which could allow local users to overwrite arbitrary files as other users. Table […]

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Debian 11 — libdbd-firebird-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libdbd-firebird-perl — vulnerability — patch and remediation guide

  • August 27, 2021
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 25 May 2026 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2015-2788 Upstream summary: Multiple stack-based buffer overflows in the ib_fill_isqlda function in dbdimp.c in DBD-Firebird before 1.19 allow remote attackers to have unspecified impact via unknown vectors that […]

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

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

  • August 27, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5763-1 Related CVEs: CVE-2021-33430 CVE-2021-34141 CVE-2021-41495 CVE-2021-41496 Upstream summary: It was discovered that NumPy did not properly manage memory when specifying arrays of large dimensions. If a user were tricked […]

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How to Perform a System Security Audit with auditd on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Perform a System Security Audit with auditd on RHEL 7

  • August 27, 2021
  • Linux
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How to Perform a System Security Audit with auditd on RHEL 7 Security auditing is a critical practice for any production RHEL 7 system, especially those subject to compliance frameworks such as PCI-DSS, HIPAA, or DISA STIG. The Linux Audit Framework, centered on the auditd daemon, provides kernel-level monitoring of system calls, file access, user […]

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How To Protect WordPress with Fail2Ban on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How To Protect WordPress with Fail2Ban on Ubuntu 14.04

  • August 27, 2021
  • Linux
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WordPress is a very robust content-management system (CMS) that is free and open source. Because anyone can comment, create an account, and post on WordPress, many malicious actors have created networks of bots and servers that compromise and spam WordPress sites through brute-force attacks. The tool Fail2ban is useful in preventing unauthorized access to both your Droplet and your WordPress site. It notes suspicious or repeated login failures and proactively bans those IPs by modifying firewall

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