XXE in Opennms Horizon
CVE-2023-0871
XXE injection in /rtc/post/ endpoint in OpenMNS Horizon 31.0.8 and versions earlier than 32.0.2 on multiple platforms is vulnerable to XML external entity (XXE) injection, which can be used for instance to force Horizon to make arbitrary HTTP requests to internal and external services. The solution is to upgrade to Meridian 2023.1.6, 2022.1.19, 2021.1.30, 2020.1.38 or Horizon 32.0.2 or newer. Meridian and Horizon installation instructions state that they are intended for installation within an organization's private networks and should not be directly accessible from the Internet. OpenNMS thanks Erik Wynter and Moshe Apelbaum for reporting this issue.
Vulnerability class: XXE (XML External Entity)
EPSS: 0.005 (39.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:L.
Affected products
- Opennms Horizon — versions 31.0.8
- Opennms Meridian
- The Opennms Group Horizon — versions 31.0.8, 0
- The Opennms Group Meridian — versions 2023.0.0, 2022.0.0, 2021.0.0
Weakness classification (CWE)
References
- security@opennms.com (Patch)
- security@opennms.com (Release Notes)
Frequently asked questions
- What is CVE-2023-0871?
- CVE-2023-0871 is a medium-severity vulnerability in Opennms Horizon, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 5.4/10. Published 2023-08-11.
- How severe is CVE-2023-0871?
- Medium severity. CVSS v3 base score is 5.4 out of 10.