CVE-2018-18556
VyOS Privilege Escalation Vulnerability
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.
INFO
Published Date :
Dec. 17, 2018, 7:29 p.m.
Last Modified :
Jan. 20, 2023, 3:28 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
6.0
Exploitability Score :
3.1
Public PoC/Exploit Available at Github
CVE-2018-18556 has a 1 public PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-18556.
| URL | Resource |
|---|---|
| http://packetstormsecurity.com/files/159234/VyOS-restricted-shell-Escape-Privilege-Escalation.html | Exploit Third Party Advisory VDB Entry |
| https://blog.mirch.io/2018/11/05/cve-2018-18556-vyos-privilege-escalation-via-sudo-pppd-for-operator-users/ | Exploit Third Party Advisory |
| https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releases | Exploit Vendor Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Security Research
vulnerabilities exploit-code security-research
Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-18556 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-18556 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Modified Analysis by [email protected]
Jan. 20, 2023
Action Type Old Value New Value Removed CVSS V3 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Changed Reference Type http://packetstormsecurity.com/files/159234/VyOS-restricted-shell-Escape-Privilege-Escalation.html No Types Assigned http://packetstormsecurity.com/files/159234/VyOS-restricted-shell-Escape-Privilege-Escalation.html Exploit, Third Party Advisory, VDB Entry -
CVE Modified by [email protected]
Sep. 21, 2020
Action Type Old Value New Value Added Reference http://packetstormsecurity.com/files/159234/VyOS-restricted-shell-Escape-Privilege-Escalation.html [No Types Assigned] -
CWE Remap by [email protected]
Oct. 03, 2019
Action Type Old Value New Value Changed CWE CWE-264 CWE-264 NVD-CWE-noinfo -
Initial Analysis by [email protected]
Feb. 06, 2019
Action Type Old Value New Value Added CVSS V2 (AV:N/AC:L/Au:S/C:C/I:C/A:C) Added CVSS V3 AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Changed Reference Type https://blog.mirch.io/2018/11/05/cve-2018-18556-vyos-privilege-escalation-via-sudo-pppd-for-operator-users/ No Types Assigned https://blog.mirch.io/2018/11/05/cve-2018-18556-vyos-privilege-escalation-via-sudo-pppd-for-operator-users/ Exploit, Third Party Advisory Changed Reference Type https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releases No Types Assigned https://blog.vyos.io/the-operator-level-is-proved-insecure-and-will-be-removed-in-the-next-releases Exploit, Vendor Advisory Added CWE CWE-264 Added CPE Configuration OR *cpe:2.3:o:vyos:vyos:1.1.8:*:*:*:*:*:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-18556 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-18556
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
1.62 }} -0.19%
score
0.87759
percentile