PT-1999-1612 · Microsoft · Windows Nt 4.0+1

Published 1999-12-31 · Updated 2017-10-10 · CVE-1999-1222

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Name of the Vulnerable Software and Affected Versions Windows NT 4.0

Description The issue allows remote malicious DNS servers to cause a denial of service by returning 0.0.0.0 as the IP address for a DNS host name lookup, which can lead to a system crash. This is due to a problem in the Netbt.sys component.

Recommendations For Windows NT 4.0, consider restricting access to DNS host name lookups from untrusted sources until a fix is available. As a temporary workaround, implement additional validation for DNS responses to prevent the system from crashing when it encounters a response with an IP address of 0.0.0.0.

Fix

Related Identifiers

CVE-1999-1222

Affected Products

Netbt.Sys

Windows Nt 4.0

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-1999-1222 · Security Note
• http://support.microsoft.com/support/kb/articles/Q188/5/71.ASP · Vendor Advisory
• https://exchange.xforce.ibmcloud.com/vulnerabilities/3893 · Note