CVE-2018-18556 Privilege escalation in n/a
A malicious operator user can exploit improper input validation in the pppd binary to execute arbitrary commands with root privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2018-18556?
CVE-2018-18556 is a critical vulnerability in n/a, published on 17 Dec 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2018-18556?
It affects 1 product.
Products include Vyos Vyos.
How do I fix CVE-2018-18556?
No fix has been published for CVE-2018-18556 yet. Limit exposure of the affected software until one is available.
Is CVE-2018-18556 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-18556 exists.
Public exploit code: 1 Metasploit module.
Other vulnerabilities in n/a
Sources
Also known as GHSA-8jmm-6g59-87gc.