CVE-1999-1087

High

Description

Internet Explorer 4 treats a 32-bit number ("dotless IP address") in the a URL as the hostname instead of an IP address, which causes IE to apply Local Intranet Zone settings to the resulting web page, allowing remote malicious web servers to conduct unauthorized activities by using URLs that contain the dotless IP address for their server.

SeverityHigh

CVSS7.5

Exploit probability—

Product

Microsoft Internet Explorer

PublishedDec 31, 1999

First seenDec 31, 1999

How to fix

Vendor advisories

docs.microsoft.com/en-us/security-updates/securitybulletins/1998/ms98-016

Affected products

Product	Affected versions	Fixed in
microsoft internet_explorer	4.0, 4.0.1	—

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