Security Advisory SA42830 - QEMU Empty VNC Password Authentication Bypass Security Issue

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Secunia Advisory SA42830

QEMU Empty VNC Password Authentication Bypass Security Issue

Secunia Advisory

SA42830

Release Date

2011-02-07

Popularity

2,197 views

Comments

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Criticality level

Moderately critical

Impact

Security Bypass

Where

From remote

Authentication level

This information is available to Secunia VIM customers

Report reliability

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Solution Status

Unpatched

Systems affected

This information is available to Secunia VIM customers

Approve distribution

This information is available to Secunia VIM customers

Remediation status

Secunia VIM

Software:

QEMU 0.x

Secunia CVSS Score

This information is available to Secunia VIM Customers

CVE Reference(s)

CVE-2011-0011 CVSS score available to Secunia VIM customers

Description

A security issue has been reported in QEMU, which can be exploited by malicious people to bypass certain security restrictions.

The security issue is caused due to QEMU incorrectly disabling the authentication if an empty VNC password is set, which can be exploited to e.g. access the VNC service.

Solution
Do not set empty VNC passwords.

Provided and/or discovered by
Reported in an Ubuntu bug by Neil Wilson.

Original Advisory
Ubuntu Bug #697197:
https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/697197

Deep Links
Links available to Secunia VIM customers

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Subject: QEMU Empty VNC Password Authentication Bypass Security Issue

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Secunia Advisory SA42830

QEMU Empty VNC Password Authentication Bypass Security Issue

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