CVE-2020-12760 OpenNMS Horizon RCE via Unsafe Deserialization
Authenticated users can achieve remote code execution via unsafe Java object deserialization in the ActiveMQ channel configuration.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-12760?
CVE-2020-12760 is a high-severity unsafe deserialization vulnerability in n/a, published on 11 May 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
An issue was discovered in OpenNMS Horizon before 26.0.1, and Meridian before 2018.1.19 and 2019 before 2019.1.7. The ActiveMQ channel configuration allowed for arbitrary deserialization of Java objects (aka ActiveMQ Minion payload deserialization), leading to remote code execution for any authenticated channel user regardless of its assigned permissions.
Weakness: CWE-502
Which versions are affected by CVE-2020-12760?
2 open source packages ship an affected version, including org.opennms.core:org.opennms.core.daemon. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
org.opennms.core:org.opennms.core.daemon Maven | All versions | 26.0.1 |
org.opennms.core:org.opennms.core.daemon Maven | All versions | 26.0.1 |
Products include Opennms Opennms Horizon, Opennms Opennms Meridian.
How do I fix CVE-2020-12760?
Upgrade org.opennms.core:org.opennms.core.daemon to 26.0.1 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2020-12760 being exploited?
There is no known exploitation of CVE-2020-12760 in the wild and no public exploit code.
Sources
Also known as GHSA-853f-x27w-8r74.