Medium severity · published Feb 11, 2021
CVE-2020-9307
Hirschmann OS2, RSP, and RSPE devices before HiOS 08.3.00 allow a denial of service
6.5
CVSS
0.6%
EPSS
No
On KEV
Description
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).
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 48% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HH
Hirschmann Hios · Belden
07.0.04 before 07.1.00; 08.0.00 before 08.3.00 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-9307
CVE.org
https://www.cve.org/CVERecord?id=CVE-2020-9307
Vendor Advisory
https://www.belden.com/dfsmedia/f1e38517e0cd4caa8b1acb6619890f5e/12276-source/options/view
Vendor Advisory
https://www.belden.com/security
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