Vulnerability Details : CVE-2018-18556

Public exploit exists!
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.
Published 2018-12-17 19:29:01
Updated 2023-01-20 15:28:06
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Gain privilege

Exploit prediction scoring system (EPSS) score for CVE-2018-18556

Probability of exploitation activity in the next 30 days: 2.57%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 90 % EPSS Score History EPSS FAQ

Metasploit modules for CVE-2018-18556

  • VyOS restricted-shell Escape and Privilege Escalation
    Disclosure Date: 2018-11-05
    First seen: 2020-09-19
    exploit/linux/ssh/vyos_restricted_shell_privesc
    This module exploits command injection vulnerabilities and an insecure default sudo configuration on VyOS versions 1.0.0 <= 1.1.8 to execute arbitrary system commands as root. VyOS features a `restricted-shell` system shell intended for use by low

CVSS scores for CVE-2018-18556

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
9.0
 HIGH AV:N/AC:L/Au:S/C:C/I:C/A:C
8.0
10.0
 NIST
9.9
 CRITICAL CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1
6.0
 NIST

References for CVE-2018-18556

Products affected by CVE-2018-18556

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