Vulnerability Details : CVE-2020-9307
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).
Vulnerability category: Denial of service
Exploit prediction scoring system (EPSS) score for CVE-2020-9307
Probability of exploitation activity in the next 30 days: 0.07%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 28 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2020-9307
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
6.1
|
MEDIUM | AV:A/AC:L/Au:N/C:N/I:N/A:C |
6.5
|
6.9
|
NIST |
|
6.5
|
MEDIUM | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.8
|
3.6
|
NIST |
CWE ids for CVE-2020-9307
-
The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.Assigned by: nvd@nist.gov (Primary)
References for CVE-2020-9307
-
https://www.belden.com/dfsmedia/f1e38517e0cd4caa8b1acb6619890f5e/12276-source/options/view
Vendor Advisory
-
https://www.belden.com/security
Security AssuranceVendor Advisory
Products affected by CVE-2020-9307
- cpe:2.3:o:belden:hirschmann_hios:*:*:*:*:*:*:*:*
- cpe:2.3:o:belden:hirschmann_hios:*:*:*:*:*:*:*:*