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7.2

Citrix DNE driver lets local users gain higher privileges

CVE-2008-5121 · published 17 years ago
Summary

The Citrix Deterministic Network Enhancer driver (dne2000.sys) used in some VPN and proxy tools can be tricked by a local user into granting them extra rights on the computer. This happens when the user sends a specially crafted request to the driver’s interface. Apply the latest Citrix update or replace the driver to stop the issue.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
citrix deterministic_network_enhancer 2.21.7.223
3.21.7.17464
cpe:2.3:a:citrix:deterministic_network_enhancer:2.21.7.223:*:*:*:*:*:*:*
Original advisory text
dne2000.sys in Citrix Deterministic Network Enhancer (DNE) 2.21.7.233 through 3.21.7.17464, as used in (1) Cisco VPN Client, (2) Blue Coat WinProxy, and (3) SafeNet SoftRemote and HighAssurance Rem...
dne2000.sys in Citrix Deterministic Network Enhancer (DNE) 2.21.7.233 through 3.21.7.17464, as used in (1) Cisco VPN Client, (2) Blue Coat WinProxy, and (3) SafeNet SoftRemote and HighAssurance Remote, allows local users to gain privileges via a crafted DNE_IOCTL DeviceIoControl request to the \\.\DNE device interface.
References
Fix within
Internet-facing 14 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker full control (estimated)
Severity
7.2 High
Exploitation
1% chance of attack within 30 days
Type
CWE-264Permissions, Privileges, and Access Controls
Timeline
Published18 Nov 2008
Updated4 Nov 2026
First seen29 Sep 2026
Sources
CVE-2008-5121 · NVD
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