Active Debug Code in Siemens TIM 3V-IE and 4R-IE Family Devices

1) Active Debug Code

EUVDB-ID: #VU26964

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-10939

CWE-ID: CWE-489 - Active Debug Code

Exploit availability: No

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

CPE2.3

• cpe:2.3:h:siemens:tim_3v-ie:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:tim_3v-ie_advanced:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:tim_3v-ie_dnp3:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:tim_4r-ie:*:*:*:*:*:*:*:*
• cpe:2.3:h:siemens:tim_4r-ie_dnp:*:*:*:*:*:*:*:*

External links

https://cert-portal.siemens.com/productcert/pdf/ssa-359303.pdf

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.