SafeNet Sentinel License Manager vulnerable to buffer overflow

ID VU:108790
Type cert
Reporter CERT
Modified 2005-03-14T00:00:00



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.

Systems Affected

Vendor| Status| Date Notified| Date Updated
SafeNet| | -| 08 Mar 2005
If you are a vendor and your product is affected, let us know.

CVSS Metrics

Group | Score | Vector
Base | N/A | N/A
Temporal | N/A | N/A
Environmental | N/A | N/A


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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: CAN-2005-0353
  • Date Public: 07 Mar 2005
  • Date First Published: 08 Mar 2005
  • Date Last Updated: 14 Mar 2005
  • Severity Metric: 5.67
  • Document Revision: 14