#VU51524 Infinite loop in Belden Inc. products - CVE-2020-9307

Vulnerability identifier: #VU51524

Vulnerability risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

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
https://www.belden.com/dfsmedia/f1e38517e0cd4caa8b1acb6619890f5e/12276-source/options/view
https://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.