Linux

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

Debian 11 — tcpslice — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 July 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-41043 Upstream summary: Use after free in tcpslice triggers AddressSanitizer, no other confirmed impact. Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage […]

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

Debian 11 — hyperkitty — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 July 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-33038 Upstream summary: An issue was discovered in management/commands/hyperkitty_import.py in HyperKitty through 1.3.4. When importing a private mailing list's archives, these archives are publicly visible for the duration […]

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How to Set Up a Redis Server as a Session Handler for PHP on Ubuntu 14.04 — step-by-step Linux tutorial on Progressive Robot

How to Set Up a Redis Server as a Session Handler for PHP on Ubuntu 14.04

Redis is an open source key-value cache and storage system, also referred to as a data structure server for its advanced support for several data types, such as hashes, lists, sets, and bitmaps, amongst others. It also supports clustering, which makes it often used for highly-available and scalable environments. In this tutorial, we’ll see how to install and configure an external Redis server to be used as a session handler for a PHP application running on Ubuntu 14.04.

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

Debian 11 — uimaj — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 July 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2017-15691 Upstream summary: In Apache uimaj prior to 2.10.2, Apache uimaj 3.0.0-xxx prior to 3.0.0-beta, Apache uima-as prior to 2.10.2, Apache uimaFIT prior to 2.4.0, Apache uimaDUCC prior […]

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How To Protect an Nginx Server with Fail2Ban on Rocky Linux 9 — step-by-step Linux tutorial on Progressive Robot

How To Protect an Nginx Server with Fail2Ban on Rocky Linux 9

In this guide, you will learn how to install `fail2ban` on a Rocky Linux 9 server and configure it to monitor your Nginx logs for intrusion attempts. Fail2ban can significantly mitigate brute force attacks by creating rules that automatically alter your firewall configuration to ban specific IPs after a certain number of unsuccessful login attempts. This will allow your server to harden itself against these access attempts without intervention from you.

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Debian 11 — puppet-module-puppetlabs-apt — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — puppet-module-puppetlabs-apt — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 29 July 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-6508 CVE-2022-3275 Upstream summary: Puppet Enterprise 2017.3.x prior to 2017.3.3 are vulnerable to a remote execution bug when a specially crafted string was passed into the facter_task or […]

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Alpine Linux edge — py3-joblib — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — py3-joblib — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 1.2.0-r0 📖 ~4 min read  •  Source: Alpine secdb entry — py3-joblib 1.2.0-r0 Related CVEs: CVE-2022-21797 Upstream summary: Alpine community repository for vedge ships py3-joblib 1.2.0-r0 which addresses CVE-2022-21797. Table of contents Symptom & Impact Environment […]

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Ubuntu 18.04 — networkd-dispatcher — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — networkd-dispatcher — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 29 July 2022 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5395-2 Related CVEs: https://launchpad.net/bugs/1971550 CVE-2022-29799 CVE-2022-29800 Upstream summary: USN-5395-1 fixed vulnerabilities in networkd-dispatcher. Unfortunately that update was incomplete and could introduce a regression. This update fixes the problem. We apologize […]

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