Linux

Gentoo Linux — media-gfx/exiv2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Gentoo Linux

Gentoo Linux — media-gfx/exiv2 — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Gentoo Linux 📖 ~4 min read  •  Source: Gentoo GLSA GLSA-202312-06 Related CVEs: CVE-2020-18771 CVE-2020-18773 CVE-2020-18774 CVE-2020-18899 CVE-2021-29457 CVE-2021-29458 CVE-2021-29463 CVE-2021-29464  +12 more Upstream summary: Multiple vulnerabilities have been discovered in Exiv2. Please review the CVE identifiers referenced below for details. Table […]

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How to Set Up Tripwire for File Integrity Monitoring on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up Tripwire for File Integrity Monitoring on RHEL 7

How to Set Up Tripwire for File Integrity Monitoring on RHEL 7 File Integrity Monitoring (FIM) is the practice of detecting unauthorised changes to critical system files, configuration files, and binaries. When an attacker compromises a system, they often modify files to install backdoors, alter logging behaviour, or escalate privileges. Tripwire creates a cryptographic baseline […]

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Common Problems 120623

Debian 11: UFW blocks required application ports

🟡 Medium   ⏱ 5–30 min  Last verified: 16 March 2022 Affected versions: Debian 11 📖 ~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 & […]

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Debian 10 — composer — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — composer — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 March 2022 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2021-29472 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Debian 11 — libiberty — multiple vulnerabilities (10 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libiberty — multiple vulnerabilities (10 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2016-2226 CVE-2016-4487 CVE-2016-4488 CVE-2016-4489 CVE-2016-4490 CVE-2016-4491 CVE-2016-4492 CVE-2016-4493  +2 more Upstream summary: Integer overflow in the string_appends function in cplus-dem.c in libiberty allows remote attackers to execute arbitrary […]

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

Debian 11 — fmtlib — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-1000052 Upstream summary: fmtlib version prior to version 4.1.0 (before commit 0555cea5fc0bf890afe0071a558e44625a34ba85) contains a Memory corruption (SIGSEGV), CWE-134 vulnerability in fmt::print() library function that can result in Denial […]

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Debian 11 — yubico-piv-tool — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — yubico-piv-tool — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 15 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2018-14779 CVE-2018-14780 CVE-2020-13131 CVE-2020-13132 Upstream summary: A buffer overflow issue was discovered in the Yubico-Piv 1.5.0 smartcard driver. The file lib/ykpiv.c contains the following code in the function […]

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

Debian 11 — rtkit — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 March 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-4326 Upstream summary: RealtimeKit (aka rtkit) 0.5 does not properly use D-Bus for communication with a polkit authority, which allows local users to bypass intended access restrictions by […]

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Ubuntu 20.04 — usbview — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — usbview — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 15 March 2022 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-5249-1 Related CVEs: CVE-2022-23220 Upstream summary: It was discovered that USBView allowed unprivileged users to run usbview as root. A local attacker could use this vulnerability to gain administrative privileges […]

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