CVE-2018-15492
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 · uneditedA vulnerability in the lservnt.exe component of Sentinel License Manager version 8.5.3.35 (fixed in 8.5.3.2403) causes UDP amplification.
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 UDP amplification vulnerability exists in the lservnt.exe component of Sentinel License Manager version 8.5.3.35. The vulnerability allows an attacker to send small requests to the vulnerable UDP service which responds with significantly larger responses, enabling reflection/amplification attacks for DDoS or network reconnaissance.
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>= 8.5.3.35, <= 8.5.3.2403CVSS 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
- None
- Availability
- High
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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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Verify Sentinel License Manager is installedCheck for the presence of Sentinel License Manager software on the system. Common installation paths include C:\Program Files\Sentinel or check Windows Programs and Features.Affected if Sentinel License Manager software is found on the system
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Identify if lservnt.exe process is runningOpen Task Manager or use command 'tasklist | findstr lservnt.exe' to check if the lservnt.exe process is active.Affected if lservnt.exe process is running as a service
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Check the installed version numberRight-click lservnt.exe in the installation directory, select Properties, then view the Details tab for the File Version. Alternatively, check the version through Windows Programs and Features.Affected if The version number falls within the range 8.5.3.35 through 8.5.3.2403 inclusive
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Verify UDP service is listeningUse netstat command: 'netstat -ano | findstr UDP' to list active UDP ports. Look for the license manager port (commonly UDP 5093, but verify in your environment).Affected if A UDP port associated with Sentinel License Manager is in LISTENING state
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Confirm UDP port is externally accessibleCheck Windows Firewall rules or external network filters: run 'netsh firewall show config' or review firewall appliance rules to see if UDP traffic is allowed to the license manager port from untrusted networks.Affected if Firewall rules permit unrestricted inbound UDP traffic to the Sentinel License Manager port
The system is affected if Sentinel License Manager version 8.5.3.35 to 8.5.3.2403 is installed with lservnt.exe running and its UDP port exposed to untrusted networks.
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 Sentinel License Manager to version 8.5.3.2403 or later. Additionally, implement network filtering or firewall rules to restrict unauthorized UDP traffic to the license manager service port.
- Consultation4.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-15492 — 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-2018-15492 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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