CVE-2018-18556

CriticalCVSS 9.9/10Last modified Jun 17, 2026

Description

A privilege escalation issue was discovered in VyOS 1.1.8. The default configuration also allows operator users to execute the pppd binary with elevated (sudo) permissions. Certain input parameters are not properly validated. A malicious operator user can run the binary with elevated permissions and leverage its improper input validation condition to spawn an attacker-controlled shell with root privileges.

Metrics

CVSS 3.1 9.9/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected software

No affected versions have been published.

Timeline

Published
Dec 17, 2018
Last modified
Jun 17, 2026
NVD status
Modified

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