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CVE-2013-6920

10.0 · HIGH

Siemens SINAMICS S/G controllers with firmware before 4.6.11 do not require authentication for FTP and TELNET sessions, which allows remote attackers to bypass intended access restrictions via TCP…

Published Dec 7, 2013siemensCWE-287EPSS 3.23%

Overview

CVE-2013-6920 is a high-severity vulnerability affecting siemens sinamics_s\/g_family_firmware. It was published on December 7, 2013 and has a CVSS 2.0 base score of 10.0 (HIGH).

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Siemens SINAMICS S/G controllers with firmware before 4.6.11 do not require authentication for FTP and TELNET sessions, which allows remote attackers to bypass intended access restrictions via TCP traffic to port (1) 21 or (2) 23.

Remediation

Check the references section for vendor advisories and patches from siemens. Update sinamics_s\/g_family_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
siemenssinamics_s\/g_family_firmware0Affected

References

Refics-cert.us-cert.gov/advisories/ICSA-13-338-01Refwww.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-742938.pdfRefcert-portal.siemens.com/productcert/pdf/ssa-742938.pdfRefics-cert.us-cert.gov/advisories/ICSA-13-338-01Refwww.siemens.com/innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-742938.pdfRefcert-portal.siemens.com/productcert/pdf/ssa-742938.pdf

How CyberStrike helps

Frequently asked questions

What is CVE-2013-6920?

CVE-2013-6920 is a high-severity vulnerability affecting siemens sinamics_s\/g_family_firmware. It was published on December 7, 2013 and has a CVSS 2.0 base score of 10.0 (HIGH).

How severe is CVE-2013-6920?

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2013-6920?

Check the references section for vendor advisories and patches from siemens. Update sinamics_s\/g_family_firmware to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2013-6920?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2013-6920 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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