CVE-2018-15492: A vulnerability in the lservnt.exe component of Sentinel License Manager version 8.5.3.35 (fixed in 8.5.3.2403

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HIGH 7.5REMOTEUPGRADE

CVE-2018-15492 is a high-severity flaw (CVSS 7.5) affecting sentinel license manager. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the lservnt.exe component of Sentinel License Manager version 8.5.3.35 (fixed in 8.5.3.2403) causes UDP amplification.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.2% (top 32%)
CISA exploited list	No
Weakness	CWE-405
Published	2018-08-18
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: gemalto

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2018-08-18 02:29 UTCPublished CVE record published
2026-06-17 01:42 UTCUpdated Record last modified

gemalto sentinel license manager UPGRADE

Affected: >= 8.5.3.35 and <= 8.5.3.2403

Fixed in: newer than 8.5.3.2403

Safe to downgrade to: a release before 8.5.3.35

1. Check installed version

apt-cache policy sentinel-license-manager || rpm -q sentinel-license-manager || sentinel-license-manager --version

2. UPGRADE to newer than 8.5.3.2403 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sentinel-license-manager

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sentinel-license-manager

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 8.5.3.35 (Debian / Ubuntu)

apt-cache madison sentinel-license-manager sudo apt install sentinel-license-manager=<VERSION_BEFORE_8.5.3.35> sudo apt-mark hold sentinel-license-manager

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list sentinel-license-manager sudo dnf downgrade sentinel-license-manager-<VERSION_BEFORE_8.5.3.35> sudo dnf versionlock add sentinel-license-manager

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2018-15492?

sentinel license manager: upgrade to newer than 8.5.3.2403. Exact commands for each OS are on this page.

Is CVE-2018-15492 being exploited?

CVE-2018-15492 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2018-15492 affect?

CVE-2018-15492 affects sentinel license manager. Severity is high (CVSS 7.5). A vulnerability in the lservnt.exe component of Sentinel License Manager version 8.5.3.35 (fixed in 8.5.3.2403) causes UDP amplification.

How urgent is CVE-2018-15492?

Priority 48/100. High severity; Remotely exploitable, no login, no user action

References

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