CVE-2023-39668
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 · uneditedD-Link DIR-868L fw_revA_1-12_eu_multi_20170316 was discovered to contain a buffer overflow via the param_2 parameter in the inet_ntoa() function.
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 · high confidenceA buffer overflow vulnerability exists in the D-Link DIR-868L router firmware (version fw_revA_1-12_eu_multi_20170316) where the param_2 parameter passed to the inet_ntoa() function is not properly validated, allowing an attacker to overflow the buffer and potentially execute arbitrary code.
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= 1.12_eu_multi_20170316CVSS 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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Confirm device model is D-Link DIR-868LCheck the device label on the router or log into the web management interface and locate the device model information, typically found under Status or System settingsAffected if Device model is not DIR-868L
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Identify installed firmware versionLog into the router web interface, navigate to Maintenance > Firmware Upgrade or Status page, and record the firmware version string displayed (commonly shows as fw_revA_1-12_eu_multi_20170316 or similar)Affected if Firmware version matches 1.12_eu_multi_20170316 exactly
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Check web interface accessibilityAttempt to access the router web interface at its LAN IP address (default 192.168.0.1) using a browser. The vulnerable function is exposed through the web interfaceAffected if Web interface is accessible and firmware version is 1.12_eu_multi_20170316
You are affected if your D-Link DIR-868L router is running firmware version 1.12_eu_multi_20170316 and its web management interface is 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.
dbcve · scopedReplace the end-of-life D-Link DIR-868L router with a currently supported model, or implement network segmentation/firewall rules to restrict access to the device's management interface from untrusted networks.
- 1. Replace the D-Link DIR-868L router with a newer model from a vendor that provides active security support, as this device has reached end-of-life and no longer receives firmware updates.
- 2. If replacement is not immediately possible, isolate the affected device on a separate network segment to limit potential exposure.
- 3. Monitor the device for any unauthorized access or unusual network activity.
- 4. Implement additional network-level controls such as firewall rules to restrict access to the vulnerable service.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation6.0 h
- Implementation16.0 h
- Testing8.0 h
- Review / QA6.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2023-39668 — 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-2023-39668 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
- No weaponised exploit code, or anything meant to cause harm
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