CVE-2018-18556
23Vexday Risk Score
Patch soon. It has a working public exploit.
ssvc Attendepss 15%
from disclosure to weapon0 days
Published on NVDDec 17
metasploitNov 5
exploitation probability
15%top 3% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
n/a · n/aReferences
http://packetstormsecurity.com/files/159234/VyOS-restricted-shell-Escape-Privilege-Escalation.htmlhttps://blog.mirch.io/2018/11/05/cve-2018-18556-vyos-privilege-escalation-via-sudo-pppd-for-operator-users/https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releases