CVE-2018-17903
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 · uneditedSAGA1-L8B with any firmware versions prior to A0.10 are vulnerable to a replay attack and command forgery.
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 SAGA1-L8B device with firmware versions prior to A0.10 lacks protection against replay attacks and command forgery. An attacker can capture valid commands transmitted to the device and replay them, or craft arbitrary malicious commands that the device will accept as legitimate, due to absent or weak authentication mechanisms.
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< a0.10CVSS 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
- None
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/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 the device modelLocate the physical device or documentation confirming the model is SAGA1-L8B (also marketed as Sagaradio Saga1 L8b). Check device labels, inventory records, or network discovery outputs.Affected if The device is not a SAGA1-L8B model - different products are not affected by this specific CVE.
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Determine the installed firmware versionAccess the device management interface (web UI, CLI, or serial console) and locate the firmware version information. Consult device documentation for the specific command or menu path to retrieve version details.Affected if Unable to retrieve firmware version - without confirmation of the version, assume the device may be vulnerable.
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Compare firmware version to affected rangeReview the retrieved firmware version against the affected range: any version prior to A0.10 (for example, A0.09, A0.08, or earlier releases) is vulnerable.Affected if Firmware version is < A0.10 - the device lacks replay attack protection and command authentication, making it vulnerable to the attacks described in this CVE.
You are affected if you have a SAGA1-L8B device running firmware version earlier than A0.10.
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.
dbcve · scopedUpgrade SAGA1-L8B firmware to version A0.10 or later which includes replay attack prevention and command authentication. If upgrade is not immediately possible, network segmentation and monitoring for anomalous command patterns should be implemented.
Firmware version A0.10
- Obtain the SAGA1-L8B firmware version A0.10 or later from the device manufacturer (SAGA)
- Consult the device documentation or contact SAGA technical support for specific firmware upgrade instructions
- Follow the manufacturer's recommended procedure to upload and install firmware version A0.10 on the SAGA1-L8B device
- After upgrade, verify the device is running firmware version A0.10 or later
- Test that the device functions normally after the firmware update
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation8.0 h
- Implementation16.0 h
- Testing12.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $11,200.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-17903 — 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-2018-17903 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
- No spam, self-promotion, credentials, or personal data