PT-2018-04: Sensitive Information Disclosure in Siemens SIPROTEC 4 and SIPROTEC Compact relays

(PT-2018-04) Positive Technologies Security Advisory
Sensitive Information Disclosure in Siemens SIPROTEC 4 and SIPROTEC Compact relays

Vulnerable products

SIPROTEC 4 7SJ66
Version: 4.29 and earlier
SIPROTEC Compact 7SJ80
Version: 4.76 and earlier
SIPROTEC Compact 7SK80
Version: 4.76 and earlier
Other SIPROTEC Compact relays
Version: all vesions
Other SIPROTEC 4 relays
Version: all vesions

Link:
https://www.siemens.com/

Severity level

Severity level: High
Impact: Sensitive Information Disclosure
Access Vector: Remote

CVSS v3:
Base Score: 9.0
Vector: (AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H)

CVE: CVE-2018-4839

Vulnerability description

The specialists of the Positive Research center have detected a Sensitive Information Disclosure vulnerability in Siemens SIPROTEC 4 and SIPROTEC Compact relays.

Vulnerability allows unauthenticated remote, low-skilled attackers to upload a modified device configuration overwriting access authorization passwords, and obtain full control over the device.

How to fix

Update firmware to the latest version or use the vendor's recommendations

Advisory status

17.12.2015 - Vendor gets vulnerability details
08.03.2018 - Vendor releases fixed version and details
30.03.2018 - Public disclosure

Credits

The vulnerability was detected by Ilya Karpov and Dmitry Sklyarov, Positive Research Center (Positive Technologies Company)

References

http://en.securitylab.ru/lab/PT-2018-04
https://ics-cert.us-cert.gov/advisories/ICSA-18-067-01
https://cert-portal.siemens.com/productcert/pdf/ssa-203306.pdf

Reports on the vulnerabilities previously discovered by Positive Research:

https://www.ptsecurity.com/
https://en.securitylab.ru/lab/

About Positive Technologies

Positive Technologies is a leading digital security firm with over 15 years of experience in 360 protection of critical IT systems against the most advanced cyberthreats. State-of-the-art solutions are developed at the company's research centerone of the largest in Europe. Positive Technologies experts have helped to identify and fix over 250 zero-day vulnerabilities in products from Cisco, Google, Honeywell, Huawei, Microsoft, Oracle, SAP, Schneider Electric, Siemens, and others, earning a reputation for world-class expertise in protection of devices and infrastructures at all scales from ATMs to nuclear power stations. Findings by Positive Technologies researchers are used for updating the MaxPatrol knowledge base and for development of security solutions including PT Application Firewall, PT Application Inspector, MaxPatrol. These products allow securing web applications, evaluating network protection, blocking attacks in real time, ensuring compliance with industry and national standards, and training security specialists. Positive Technologies is the organizer of the annual Positive Hack Days international forum and security competition.