What is CVE-2020-9307?

CVE-2020-9307 is a vulnerability that allows an unauthenticated attacker to cause a denial of service on Hirschmann OS2, RSP, and RSPE devices before HiOS 08.3.00.

What is the severity of CVE-2020-9307?

The severity of CVE-2020-9307 is medium with a CVSS score of 6.5.

How can I fix CVE-2020-9307?

To fix CVE-2020-9307, upgrade Hirschmann OS2, RSP, and RSPE devices to HiOS 08.3.00 or later.

Where can I find more information about CVE-2020-9307?

More information about CVE-2020-9307 can be found on the Belden website at https://www.belden.com/dfsmedia/f1e38517e0cd4caa8b1acb6619890f5e/12276-source/options/view or in the official security advisory at https://www.belden.com/security.

Vulnerability/
CVE-2020-9307

medium

6.5

CWE

835

11/2/2021

4/8/2024

CVE-2020-9307

Q: How does CVE-2020-9307 affect Hirschmann OS2, RSP, and RSPE devices?

CVE-2020-9307 allows an unauthenticated attacker to cause an infinite loop on one of the HSR ring ports of the device, effectively breaking the redundancy of the HSR ring.

First published: Thu Feb 11 2021(Updated: )

Hirschmann OS2, RSP, and RSPE devices before HiOS 08.3.00 allow a denial of service. An unauthenticated, adjacent attacker can cause an infinite loop on one of the HSR ring ports of the device. This effectively breaks the redundancy of the HSR ring. If the attacker can perform the same attack on a second device, the ring is broken into two parts (thus disrupting communication between devices in the different parts).

Credit: cve@mitre.org

Affected Software	Affected Version	How to fix
Belden Hirschmann HIOS	>=07.0.04<07.1.00
Belden Hirschmann HIOS	>=08.0.00<08.3.00

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Frequently Asked Questions

What is CVE-2020-9307?
CVE-2020-9307 is a vulnerability that allows an unauthenticated attacker to cause a denial of service on Hirschmann OS2, RSP, and RSPE devices before HiOS 08.3.00.
How does CVE-2020-9307 affect Hirschmann OS2, RSP, and RSPE devices?
CVE-2020-9307 allows an unauthenticated attacker to cause an infinite loop on one of the HSR ring ports of the device, effectively breaking the redundancy of the HSR ring.
What is the severity of CVE-2020-9307?
The severity of CVE-2020-9307 is medium with a CVSS score of 6.5.
How can I fix CVE-2020-9307?
To fix CVE-2020-9307, upgrade Hirschmann OS2, RSP, and RSPE devices to HiOS 08.3.00 or later.
Where can I find more information about CVE-2020-9307?
More information about CVE-2020-9307 can be found on the Belden website at https://www.belden.com/dfsmedia/f1e38517e0cd4caa8b1acb6619890f5e/12276-source/options/view or in the official security advisory at https://www.belden.com/security.

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vendor/belden
canonical/belden hirschmann hios
version/belden hirschmann hios/07.0.04
version/belden hirschmann hios/08.0.00

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