CVE-2018-18556 Details
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 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| http://packetstormsecurity.com/files/159234/VyOS-restricted-shell-Escape-Privilege-Escalation.html | CVE | ExploitThird Party AdvisoryVDB Entry |
| https://blog.mirch.io/2018/11/05/cve-2018-18556-vyos-privilege-escalation-via-sudo-pppd-for-operator-users/ | CVE | ExploitThird Party Advisory |
| https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releases | CVE | ExploitVendor Advisory |
| http://packetstormsecurity.com/files/159234/VyOS-restricted-shell-Escape-Privilege-Escalation.html | [email protected] | ExploitThird Party AdvisoryVDB Entry |
| https://blog.mirch.io/2018/11/05/cve-2018-18556-vyos-privilege-escalation-via-sudo-pppd-for-operator-users/ | [email protected] | ExploitThird Party Advisory |
| https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releases | [email protected] | ExploitVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| NVD-CWE-noinfo | Insufficient Information to Classify Weakness | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| vyos vyos | 1.1.8 |
CPE
Remediation
| |
Change History
7 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Nov 21, 2024 | CVE Modified | CVE |
| May 14, 2024 | CVE Modified | [email protected] |
| Jan 20, 2023 | Modified Analysis | [email protected] |
| Sep 21, 2020 | CVE Modified | [email protected] |
| Oct 3, 2019 | CWE Remap | [email protected] |
| Feb 6, 2019 | Initial Analysis | [email protected] |