CVE-2018-4858 Information

Description

A vulnerability has been identified in IEC 61850 system configurator (All versions V5.80) DIGSI 5 (affected as IEC 61850 system configurator is incorporated) (All versions V7.80) DIGSI 4 (All versions V4.93) SICAM PAS/PQS (All versions V8.11) SICAM PQ Analyzer (All versions V3.11) SICAM SCC (All versions V9.02 HF3). A service of the affected products listening on all of the host’s network interfaces on either port 4884/TCP 5885/TCP or port 5886/TCP could allow an attacker to either exfiltrate limited data from the system or to execute code with Microsoft Windows user permissions. Successful exploitation requires an attacker to be able to send a specially crafted network request to the vulnerable service and a user interacting with the service’s client application on the host. In order to execute arbitrary code with Microsoft Windows user permissions an attacker must be able to plant the code in advance on the host by other means. The vulnerability has limited impact to confidentiality and integrity of the affected system. At the time of advisory publication no public exploitation of this security vulnerability was known. Siemens confirms the security vulnerability and provides mitigations to resolve the security issue.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

http://www.securityfocus.com/bid/105933 https://cert-portal.siemens.com/productcert/pdf/ssa-159860.pdf https://ics-cert.us-cert.gov/advisories/ICSA-18-317-01

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8