Vulnerability identifier: #VU12076

Vulnerability 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

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Simatic WinCC OA iOS App
Mobile applications / Apps for mobile phones

Vendor: Siemens

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

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

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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.

Is there known malware, which exploits this vulnerability?

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