What is CVE-2018-18555?

CVE-2018-18555 is a critical-severity vulnerability in Vyos, classified under OS Command Injection. CVSS score: 9.9/10. Published 2018-12-17.

How severe is CVE-2018-18555?

Critical severity. CVSS v3 base score is 9.9 out of 10.

RCE in Vyos

CVE-2018-18555

A sandbox escape issue was discovered in VyOS 1.1.8. It provides a restricted management shell for operator users to administer the device. By issuing various shell special characters with certain commands, an authenticated operator user can break out of the management shell and gain access to the underlying Linux shell. The user can then run arbitrary operating system commands with the privileges afforded by their account.

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.018 (75.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Vyos — versions 1.1.8
N/a — versions n/a

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

cve@mitre.org (x_refsource_CONFIRM, Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2018-18555?: CVE-2018-18555 is a critical-severity vulnerability in Vyos, classified under OS Command Injection. CVSS score: 9.9/10. Published 2018-12-17.
How severe is CVE-2018-18555?: Critical severity. CVSS v3 base score is 9.9 out of 10.