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SafeNet Sentinel License Manager vulnerable to buffer overflow

Vulnerability Note VU#108790

Original Release Date: 2005-03-08 | Last Revised: 2005-03-14


SafeNet Sentinel License Manager contains a buffer overflow vulnerability, which may allow a remote unauthenticated attacker to execute arbitrary code on the server.


SafeNet Sentinel License Manager (LM) is a software-based license management application. It is reported that the "Lservnt" service in Sentinel LM contains a buffer overflow vulnerability. By sending a large amount of data to UDP port 5093, an attacker may be able to overwrite the contents of the EIP (Extended Instruction Pointer) register, thus gaining control of program execution flow.


A remote, unauthenticated attacker may be able to execute arbitrary code on the Sentinel LM server with the rights of the service. Sentinel LM runs as "SYSTEM" by default on Windows systems.


Apply a patch or upgrade

According to the CIRT.DK advisory, this issue is resolved in Sentinel License Manager 8.0

Block port 5093/udp

As a workaround, system administrators can use a firewall to block port 5093/udp at an appropriate network border, thus preventing external attackers from exploiting this vulnerability. Note that this will not prevent an attack from within the local network.

Vendor Information


SafeNet Affected

Updated:  March 08, 2005



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


US-CERT has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

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Thanks to Dennis Rand of CIRT.DK for reporting this vulnerability.

This document was written by Will Dormann.

Other Information

CVE IDs: CVE-2005-0353
Severity Metric: 5.67
Date Public: 2005-03-07
Date First Published: 2005-03-08
Date Last Updated: 2005-03-14 15:37 UTC
Document Revision: 15

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