Linux

Rocky Linux 8 — perl-Unicode-Normalize — vulnerability — patch and remediation guide — diagnosis and fix on Rocky Linux 8

Rocky Linux 8 — perl-Unicode-Normalize — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Rocky Linux 8 📖 ~4 min read  •  Source: Rocky Linux RXSA RLSA-2026:8096 Related CVEs: CVE-2025-40909 Upstream summary: Perl is a high-level programming language that is commonly used for system administration utilities and web programming. Security Fix(es): * perl: Perl threads have […]

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How to Set Up ModSecurity WAF with Apache on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up ModSecurity WAF with Apache on RHEL 9

ModSecurity is the leading open-source Web Application Firewall (WAF), capable of inspecting all HTTP requests and responses against a ruleset and blocking malicious traffic including SQL injection, cross-site scripting (XSS), remote file inclusion, and OWASP Top 10 attack patterns. Combined with the OWASP Core Rule Set (CRS), ModSecurity transforms Apache into a security gateway that […]

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Debian 13 — sslh — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — sslh — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 8 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2025-46806 CVE-2025-46807 CVE-2025-52936 Upstream summary: A Use of Out-of-range Pointer Offset vulnerability in sslh leads to denial of service on some architectures.This issue affects sslh before 2.2.4. Table […]

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Debian 13 — openfortivpn — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — openfortivpn — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 8 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2020-7041 CVE-2020-7042 CVE-2020-7043 Upstream summary: An issue was discovered in openfortivpn 1.11.0 when used with OpenSSL 1.0.2 or later. tunnel.c mishandles certificate validation because an X509_check_host negative error […]

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Debian 13 — mpv — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Debian 13

Debian 13 — mpv — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 8 November 2025 Affected versions: Debian 13 (trixie) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-6360 CVE-2020-19824 CVE-2021-30145 Upstream summary: mpv through 0.28.0 allows remote attackers to execute arbitrary code via a crafted web site, because it reads HTML documents containing VIDEO elements, […]

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Alpine Linux 3.20 — cracklib — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — cracklib — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 2.9.7-r0 📖 ~4 min read  •  Source: Alpine secdb entry — cracklib 2.9.7-r0 Related CVEs: CVE-2016-6318 Upstream summary: Alpine main repository for vv3.20 ships cracklib 2.9.7-r0 which addresses CVE-2016-6318. Table of contents Symptom & Impact Environment […]

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How to Install and Configure Caddy Web Server on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Install and Configure Caddy Web Server on RHEL 9

Caddy is a modern, open-source web server written in Go that stands out for one defining feature: automatic HTTPS. Caddy obtains and renews TLS certificates from Let’s Encrypt or ZeroSSL automatically, with zero configuration required beyond specifying a domain name. It also supports HTTP/2 and HTTP/3 (QUIC) out of the box, and its declarative Caddyfile […]

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Ubuntu 18.04 — php7.2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — php7.2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 8 November 2025 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7953-1 Related CVEs: CVE-2025-14178 CVE-2025-14180 CVE-2025-14177 CVE-2025-1735 https://launchpad.net/bugs/2121643 CVE-2025-1220 CVE-2025-6491 CVE-2025-1734  +12 more Upstream summary: It was discovered that PHP incorrectly handled memory while reading images in multi-chunk mode. An […]

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openSUSE Leap 15.6 — krb5 — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — krb5 — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory RHSA-2024:5076 (see also SUSE bugzilla) Related CVEs: CVE-2024-37370 CVE-2025-3576 CVE-2025-24528 CVE-2024-37371 Upstream summary: In MIT Kerberos 5 (aka krb5) before 1.21.3, an attacker can modify the plaintext Extra Count field of […]

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Oracle Linux 10 — kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 10

Oracle Linux 10 — kernel — vulnerability — patch and remediation guide (ELSA-2025-9348)

🟡 Medium   ⏱ 10–30 min  Last verified: 8 November 2025 Affected versions: Oracle Linux 10 📖 ~4 min read  •  Source: ELSA advisory ELSA-2025-9348 Related CVEs: CVE-2025-21999 CVE-2025-23150 CVE-2025-37738 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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