// For flags

CVE-2017-17023

 

Severity Score

8.1
*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

The Sophos UTM VPN endpoint interacts with client software provided by NPC Engineering (www.ncp-e.com). The affected client software, "Sophos IPSec Client" 11.04 is a rebranded version of NCP "Secure Entry Client" 10.11 r32792. A vulnerability in the software update feature of the VPN client allows a man-in-the-middle (MITM) or man-on-the-side (MOTS) attacker to execute arbitrary, malicious software on a target user's computer. This is related to SIC_V11.04-64.exe (Sophos), NCP_EntryCl_Windows_x86_1004_31799.exe (NCP), and ncpmon.exe (both Sophos and NCP). The vulnerability exists because: (1) the VPN client requests update metadata over an insecure HTTP connection; and (2) the client software does not check if the software update is signed before running it.

El Endpoint UTM VPN de Sophos interactúa con el software de cliente proporcionado por NPC Engineering (www.ncp-e.com). El software cliente afectado, "Sophos IPSec Client" versión 11.04 es una versión rebautizada de NCP "Secure Entry Client" versión 10.11 r32792. Una vulnerabilidad en la función software update del cliente VPN permite que un atacante man-in-the-middle (MITM) o man-on-the-side (MOTS) ejecute software malicioso y arbitrario en el equipo de un usuario de destino. Esto está relacionado con SIC_V versión 11.04-64.exe (Sophos), NCP_EntryCl_Windows_x86_1004_31799.exe (NCP) y ncpmon.exe (tanto Sophos como NCP). La vulnerabilidad existe porque: (1) el cliente VPN solicita metadatos de actualización por medio de una conexión HTTP no segura; y (2) el software cliente no comprueba si la actualización de software está firmada previo a ejecutarla.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Complete
Integrity
Complete
Availability
Complete
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2017-11-27 CVE Reserved
  • 2019-04-09 CVE Published
  • 2023-03-07 EPSS Updated
  • 2024-08-05 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-345: Insufficient Verification of Data Authenticity
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Ncp-e
Search vendor "Ncp-e"
 Ncp Secure Entry Client
Search vendor "Ncp-e" for product "Ncp Secure Entry Client"
 10.11
Search vendor "Ncp-e" for product "Ncp Secure Entry Client" and version "10.11"
32792, windows
Affected
Sophos
Search vendor "Sophos"
 Ipsec Client
Search vendor "Sophos" for product "Ipsec Client"
 11.04
Search vendor "Sophos" for product "Ipsec Client" and version "11.04"
-
Affected