CVE-2020-23621
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedThe Java Remote Management Interface of all versions of SVI MS Management System was discovered to contain a vulnerability due to insecure deserialization of user-supplied content, which can allow attackers to execute arbitrary code via a crafted serialized Java object.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceThe Java Remote Management Interface in all versions of SVI MS Management System is vulnerable to insecure deserialization of user-supplied content. Attackers can send crafted serialized Java objects that, when deserialized, allow arbitrary code execution on the affected system.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE dataall versionsCVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify if SVI MS Management System is installedSearch for SVI MS Management System files, processes, or services on the host. Common locations include /opt/, /usr/local/, or Windows Program Files directories. Check running processes for Java processes with names containing 'svi' or 'msmanagement'.Affected if The software is installed and running on the system
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Locate the Java RMI service configurationExamine the application configuration files for RMI-related settings. Look for files containing 'rmi', 'registry', 'remote', or 'serialization' in names or content within the application installation directory.Affected if RMI configuration files exist and the interface is enabled
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Verify if Java RMI port is listeningUse netstat, ss, or similar tools to identify open ports associated with the application. Common RMI ports are 1099 (default) but may vary. Check for any listening Java-based RMI services.Affected if The RMI port is open and listening on the network interface
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Assess network accessibility of the RMI interfaceReview firewall rules, network configurations, and access controls to determine if the RMI port is exposed to untrusted networks. Check if the service binds to 0.0.0.0 or an external interface.Affected if The RMI port is accessible from networks other than localhost or trusted management subnets
The system is affected if SVI MS Management System is installed with the Java Remote Management Interface enabled and accessible on the network, since all versions contain the deserialization vulnerability.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataIf a vendor patch is available, apply it immediately. Otherwise, disable or restrict access to the Java Remote Management Interface via network controls, and consider implementing a deserialization whitelist/allowlist filter or replacing the affected component.
- Consultation6.0 h
- Implementation12.0 h
- Testing6.0 h
- Review / QA3.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2020-23621 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2020-23621 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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