Vulnerability Note VU#108790

SafeNet Sentinel License Manager vulnerable to buffer overflow

Overview

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

I. Description

SafeNet Sentinel License Manager (LM) is a software-based license management application. It is reported that the "Lservnt" service in Sentinel LM 7.2.0.2 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.

II. Impact

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.

III. Solution

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 Updated
SafeNet	Vulnerable	8-Mar-2005

References

http://secunia.com/advisories/14511/
http://cirt.dk/advisories/cirt-30-advisory.pdf
http://www.securityfocus.com/bid/12742

Credit

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

This document was written by Will Dormann.

Other Information

Date Public	03/07/2005
Date First Published	03/08/2005 02:43:52 PM
Date Last Updated	03/14/2005
CERT Advisory
CVE Name	CAN-2005-0353
Metric	5.67
Document Revision	14

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