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Vigil@nce: qemu-kvm, access via VNC

January 2011 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/

SYNTHESIS OF THE VULNERABILITY

When the password of qemu-kvm 0.10.6 is empty, an attacker can connect to VNC.

- Severity: 2/4
- Creation date: 11/01/2011

IMPACTED PRODUCTS

- Unix - plateform

DESCRIPTION OF THE VULNERABILITY

The qemu-kvm product is a special version of qemu supporting hardware virtualization for Linux.

According to the documentation, when the VNC password is empty, the authentication is enabled (VNC_AUTH_VNC), but every trial is rejected.

In version 0.10.6, the vnc_display_password() function was modified (VNC_AUTH_NONE). Thus, when the VNC password is empty, every access is allowed.

When the password of qemu-kvm 0.10.6 is empty, an attacker can therefore connect to VNC.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/q...




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