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cybersecurity alert CVE-2006-5614

Windows: denial of service of Internet Connection Sharing

Synthesis of the vulnerability

An attacker on the internal network can generate a denial of service on the computer with Internet Connection Sharing.
Severity of this weakness: 1/4.
Creation date: 30/10/2006.
Références of this bulletin: BID-20804, CVE-2006-5614, VIGILANCE-VUL-6264.
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Description of the vulnerability

When a computer provides Internet Connection Sharing (ICS), it is connected to internet, and computers on the internal network use it as a proxy.

However, the ICS service of Windows does not correctly manage DNS queries with no Resource Record. This error occurs in ipnathlp.dll and stops svchost.exe.

An attacker on the internal network can therefore generate a denial of service.
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This weakness impacts software or systems such as Windows 98, Windows ME, Windows XP.

Our Vigil@nce team determined that the severity of this vulnerability announce is low.

The trust level is of type confirmed by a trusted third party, with an origin of intranet client.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this threat bulletin.

Solutions for this threat

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