CVE-2020-27519
vulnerability analysis and mitigation

Overview

Pritunl Client v1.2.2550.20 contains a local privilege escalation vulnerability in the pritunl-service component. The vulnerability was discovered in the OpenVPN configuration handling, where a malicious OpenVPN config file could be used as an attack vector (NVD).

Technical details

The vulnerability exists in the OpenVPN configuration processing where a local attacker could leverage the log and log-append options along with log injection to create or append to privileged script files. The vulnerability has been assigned a CVSS v3.1 Base Score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H (NVD).

Impact

A successful exploitation of this vulnerability allows a local attacker to execute code as root/SYSTEM, potentially leading to complete system compromise. The high severity rating indicates significant impact on system confidentiality, integrity, and availability (NVD).

Mitigation and workarounds

The issue has been patched by implementing additional configuration validation. The fix includes filtering out potentially dangerous OpenVPN configuration options such as log-append, syslog, management, and plugin directives (GitHub Patch).

Additional resources


SourceThis report was generated using AI

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