Vulnerability identifier: #VU26964

Vulnerability risk: High

CVSSv3.1: 7.8 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-10939

CWE-ID: CWE-489

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TIM 3V-IE
Hardware solutions / Other hardware appliances
TIM 3V-IE Advanced
Hardware solutions / Other hardware appliances
TIM 3V-IE DNP3
Hardware solutions / Other hardware appliances
TIM 4R-IE
Hardware solutions / Other hardware appliances
TIM 4R-IE DNP
Hardware solutions / Other hardware appliances

Vendor: Siemens

Description

The vulnerability allows a remote attacker to gain full control over the device. 

The vulnerability exists due to the affected software contains an open debug port that is available under specific conditions. A remote attacker can exploit the debug port and takeover the target device. 

Note: The vulnerability is only available if the IP address is configured to 192.168.1.2 

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TIM 3V-IE: All versions

TIM 3V-IE Advanced: All versions

TIM 3V-IE DNP3: All versions

TIM 4R-IE: All versions

TIM 4R-IE DNP: All versions

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External links
http://cert-portal.siemens.com/productcert/pdf/ssa-359303.pdf

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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