Information disclosure in Siemens Simatic WinCC OA iOS App

1) Information disclosure

EUVDB-ID: #VU12076

Risk: Low

CVSSv3.1: 4.1 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:W/RC:C]

CVE-ID: CVE-2018-4847

CWE-ID: CWE-538 - File And Directory Information Exposure

Exploit availability: No

Description

The vulnerability allows a physical attacker to obtain potentially sensitive information.

The vulnerability exists due to file and directory information exposure. A remote attacker with physical access to the mobile device can read unencrypted sensitive data from the app’s directory.

Mitigation

Siemens has identified the following specific workarounds and mitigations that users can apply to reduce the risk:

• Toggle off the button to save password while logging in, and logout after every work session.
• Follow the SIMATIC WinCC OA Security Guideline (available at https://portal.etm.at/index.php? option=com_phocadownload&view=category&id=52:security&Itemid=81) for maintaining a secured SIMATIC WinCC OA environment.
• Siemens does not recommend to use the app in high security areas.

Vulnerable software versions

Simatic WinCC OA iOS App: All versions

External links

http://www.siemens.com/cert/advisories

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to perform certain actions on the device.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.