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)
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.018 (77.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 77th percentile — 77.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Vyos — versions 1.1.8
Weakness classification (CWE)
References
- blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-n… (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.