CVE-2018-4844 Information

Description

A vulnerability has been identified in SIMATIC WinCC OA UI for Android (All versions V3.15.10) SIMATIC WinCC OA UI for iOS (All versions V3.15.10). Insufficient limitation of CONTROL script capabilities could allow read and write access from one HMI project cache folder to other HMI project cache folders within the app’s sandbox on the same mobile device. This includes HMI project cache folders of other configured WinCC OA servers. The security vulnerability could be exploited by an attacker who tricks an app user to connect to an attacker-controlled WinCC OA server. Successful exploitation requires user interaction and read/write access to the app’s folder on a mobile device. The vulnerability could allow reading data from and writing data to the app’s folder. 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:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

Reference

http://www.securityfocus.com/bid/103475 https://cert-portal.siemens.com/productcert/pdf/ssa-822928.pdf https://ics-cert.us-cert.gov/advisories/ICSA-18-081-01

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

NONE

Base Severity

6.7