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VMware Workstation: Vulnerability in NAT networking


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200601-04 / VMware
Release Date January 07, 2006
Latest Revision May 25, 2006: 02
Impact high
Exploitable remote and local
Package Vulnerable versions Unaffected versions Architecture(s)
app-emulation/vmware-workstation < >=, revision >=, revision >= All supported architectures

Related bugreports: #116238


VMware guest operating systems can execute arbitrary code with elevated privileges on the host operating system through a flaw in NAT networking.

2.  Impact Information


VMware Workstation is a powerful virtual machine for developers and system administrators.


Tim Shelton discovered that vmnet-natd, the host module providing NAT-style networking for VMware guest operating systems, is unable to process incorrect 'EPRT' and 'PORT' FTP requests.


Malicious guest operating systems using the NAT networking feature or local VMware Workstation users could exploit this vulnerability to execute arbitrary code on the host system with elevated privileges.

3.  Resolution Information


Disable the NAT service by following the instructions at, Answer ID 2002.


All VMware Workstation users should upgrade to a fixed version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose app-emulation/vmware-workstation

4.  References


Page updated January 07, 2006

Summary: This is a Gentoo Linux Security Advisory

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