CVE-2023-33377
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 · uneditedConnected IO v2.1.0 and prior has an OS command injection vulnerability in the set firewall command in part of its communication protocol, enabling attackers to execute arbitrary OS commands on devices.
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 confidenceConnected IO v2.1.0 and prior contains an OS command injection vulnerability in the 'set firewall' command within its communication protocol. Attackers can inject arbitrary OS commands through this input vector, achieving remote code execution on affected devices due to improper input validation.
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 data<= 2.1.0CVSS 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 Connected IO versionLocate and check the installed version of Connected IO software on the device. This is typically found in the device management interface, system information panel, or by querying the device directly via its administrative interface or command line if available.Affected if The installed version is 2.1.0 or any prior version.
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Confirm communication protocol is enabledCheck the device configuration or management interface to determine whether the Connected IO communication protocol is actively enabled. This may be visible in network settings, protocol configuration, or service status screens.Affected if The communication protocol is enabled and accessible over the network.
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Verify firewall configuration interface accessibilityDetermine whether the 'set firewall' command interface is exposed or accessible. This typically involves checking if remote management or CLI access is permitted, and through which network interfaces (LAN, WAN, management VLAN).Affected if The set firewall command interface is accessible remotely or via an untrusted network.
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Review firewall rules for anomaliesInspect the current firewall rule set on the Connected IO device for any unexpected, suspicious, or unauthorized rules that may indicate exploitation, such as rules allowing inbound connections on unusual ports or forwarding rules to internal resources.Affected if Unexpected firewall rules exist that were not intentionally configured.
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Check for indicators of compromiseReview system logs, command history, or audit logs for evidence of unauthorized command execution, unexpected shell invocations, or network connections originating from the device to suspicious external addresses.Affected if Logs show unexpected command execution or unauthorized access attempts to the set firewall functionality.
A user is affected if they are running Connected IO version 2.1.0 or prior with the communication protocol and set firewall feature enabled and accessible.
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 dataUpgrade to a patched version of Connected IO. If immediate patching is not possible, implement strict input validation and sanitization on the firewall configuration inputs, and isolate affected devices behind a firewall to reduce attack surface.
- Consultation4.0 h
- Implementation8.0 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-2023-33377 — 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-2023-33377 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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