Vulnerability identifier: #VU51524

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-9307

CWE-ID: CWE-835

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
Hirschmann OS2
Hardware solutions / Firmware
Hirschmann RSP
Hardware solutions / Firmware
Hirschmann RSPE
Hardware solutions / Firmware
HiOS
Operating systems & Components / Operating system

Vendor: Belden Inc.

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in the HSR implementation. A remote attacker on the local network can consume all available system resources and cause denial of service conditions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Hirschmann OS2: All versions

Hirschmann RSP: All versions

Hirschmann RSPE: All versions

HiOS: 07.0.04 - 08.0.00

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External links
http://www.belden.com/dfsmedia/f1e38517e0cd4caa8b1acb6619890f5e/12276-source/options/view
http://www.belden.com/security

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.