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CVE-2020-28393

7.5 · HIGH

An unauthenticated remote attacker could create a permanent denial-of-service condition by sending specially crafted OSPF packets.

Published May 12, 2021CWE-682EPSS 1.63%

Overview

CVE-2020-28393 is a high-severity vulnerability. It was published on May 12, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

An unauthenticated remote attacker could create a permanent denial-of-service condition by sending specially crafted OSPF packets. Successful exploitation requires OSPF to be enabled on an affected device on the SCALANCE XM-400, XR-500 (All versions prior to v6.4).

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refcert-portal.siemens.com/productcert/pdf/ssa-116379.pdfCISAus-cert.cisa.gov/ics/advisories/icsa-21-131-10Refcert-portal.siemens.com/productcert/pdf/ssa-116379.pdfCISAus-cert.cisa.gov/ics/advisories/icsa-21-131-10

How CyberStrike helps

Frequently asked questions

What is CVE-2020-28393?

CVE-2020-28393 is a high-severity vulnerability. It was published on May 12, 2021 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2020-28393?

This vulnerability has a CVSS 3.1 base score of 7.5, 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-2020-28393?

Check the references section for vendor advisories, patches, and mitigation guidance. 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-2020-28393?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-28393 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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