Horizon: XML Injection
CVE-2023-40612 is a high-severity XML injection vulnerability in Horizon from The OpenNMS Group, with a CVSS 3.1 base score of 8.0 out of 10. It can be exploited from the same local network by an attacker with a low-privileged account, without any action from a user. The record lists version 32.0.2 as the first without the flaw, so updating Horizon to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.42% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Update Horizon to 32.0.2 or a later version.
- Update Meridian to 2023.1.5 or a later version.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| The OpenNMS Group | Horizon | 31.0.8 up to, but not including, 32.0.2 | 32.0.2 |
| The OpenNMS Group | Meridian | 2023.0.0 up to, but not including, 2023.1.5 | 2023.1.5 |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- LowA basic user account is enough.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- HighAll data handled by the component can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- HighThe component can be taken down completely.
Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. Scored by NVD.
| Scoring system | Score | Severity | Scored by |
|---|---|---|---|
| CVSS 3.1 | 5.3 | Medium | CNA (opennms.com) |
| CVSS 3.1 | 8.0 | High | NVD |
Official description
In OpenMNS Horizon 31.0.8 and versions earlier than 32.0.2, the file editor which is accessible to any user with ROLE_FILESYSTEM_EDITOR privileges is vulnerable to XXE injection attacks. The solution is to upgrade to Meridian 2023.1.5 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 for reporting this issue.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: XML Injection
The product does not properly neutralize special elements that are used in XML, allowing attackers to modify the syntax, content, or commands of the XML before it is processed by an end system.
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Patches and release notes
Other vulnerabilities in Horizon
- 9.1 Critical severity
- 8.2 High severity
- 8.0 High severity
- 8.8 High severity
- 8.0 High severity
Recent XML Injection vulnerabilities
- 8.2 High severity
- 7.5 High severity
- 7.5 High severity
- 8.8 High severity
- 7.8 High severity
- 7.5 High severity
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