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Vulnerability Note VU#858993

Deterministic Network Enhancer privilege escalation vulnerability

Overview

The Deterministic Network driver contains a privilege escalation vulnerability, which can allow a local attacker to execute code with kernel privileges.

I. Description

Deterministic Networks provides a product called Deterministic Network Enhancer (DNE), which extends the Microsoft Windows networking stack. DNE is packaged with multiple applications, including the Cisco VPN Client. The DNE driver, which is provided by dne2000.sys, is vulnerable to privilege escalation. By making a certain ioctl to the DNE device driver, it is possible to execute code with windows kernel privileges.

II. Impact

A local attacker may be able to execute code with windows kernel privileges.

III. Solution

Apply an update

This issue is addressed in dne2000.sys version 3.21.12.17902. This driver is available from the DNE support page.

Cisco Windows VPN Client users should install version 5.0.03.0530, as specified in Cisco Support document CSCsm25860.

SafeNet SoftRemote users should install SoftRemote version 10.8.4, and SafeNet HighAssuranceRemote users should install HighAssuranceRemote 1.8.4. These versions include the updated DNE driver. Please see the SafeNet Customer Support page for more details.

For other products that provide the DNE driver, please check with the vendor for updates.

Systems Affected

VendorStatusDate Updated
Blue Coat SystemsVulnerable19-Jun-2008
Cisco Systems, Inc.Vulnerable18-Jun-2008
Deterministic Networks, IncVulnerable18-Jun-2008
SafeNetVulnerable27-Jun-2008

References


http://www.digit-labs.org/files/exploits/dne2000-call.c
http://www.deterministicnetworks.com/support/dnesupport.asp
http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCsm25860
http://secunia.com/advisories/30728/
http://secunia.com/advisories/30753/
http://secunia.com/advisories/30744/
http://secunia.com/advisories/30747/

Credit

This vulnerability was reported by mu-b at Digit-Labs.

This document was written by Will Dormann.

Other Information

Date Public06/17/2008
Date First Published06/18/2008 11:16:29 AM
Date Last Updated06/27/2008
CERT Advisory 
CVE-ID(s) 
NVD-ID(s) 
US-CERT Technical Alerts 
Metric22.50
Document Revision9

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