// For flags

CVE-2018-18556

VyOS restricted-shell Escape / Privilege Escalation

Severity Score

9.9
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

3
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

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.

Se ha descubierto un problema de escalado de privilegios en VyOS 1.1.8. La configuración por defecto también permite que los usuarios operadores ejecuten el binario pppd con permisos elevados (sudo). Ciertos parámetros de entrada no se validan correctamente. Un usuario operador malicioso puede ejecutar el binario con permisos elevados y aprovechar su condición de validación incorrecta para lanzar un shell controlado por el atacante con privilegios root.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Low
Authentication
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2018-10-22 CVE Reserved
  • 2018-12-17 CVE Published
  • 2024-08-05 CVE Updated
  • 2024-08-05 First Exploit
  • 2024-09-01 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Vyos
Search vendor "Vyos"
Vyos
Search vendor "Vyos" for product "Vyos"
1.1.8
Search vendor "Vyos" for product "Vyos" and version "1.1.8"
-
Affected