CVE-2020-9307 Denial of service in n/a
An unauthenticated adjacent attacker can cause an infinite loop on HSR ring ports, breaking network redundancy and disrupting communication.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-9307?
CVE-2020-9307 is a medium-severity denial of service vulnerability in n/a, published on 11 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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).
Weakness: CWE-835
Which versions are affected by CVE-2020-9307?
It affects 1 product.
Products include Belden Hirschmann Hios.
How do I fix CVE-2020-9307?
No fix has been published for CVE-2020-9307 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-9307 being exploited?
There is no known exploitation of CVE-2020-9307 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-gfvh-r99j-x28p.