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CVE-2001-0004

5.0 · MEDIUM

IIS 5.0 and 4.0 allows remote attackers to read the source code for executable web server programs by appending "%3F+.htr" to the requested URL, which causes the files to be parsed by the .HTR ISAP…

Published Feb 12, 2001microsoftEPSS 28.21%

Overview

CVE-2001-0004 is a medium-severity vulnerability affecting microsoft internet_information_server. It was published on February 12, 2001 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

IIS 5.0 and 4.0 allows remote attackers to read the source code for executable web server programs by appending "%3F+.htr" to the requested URL, which causes the files to be parsed by the .HTR ISAPI extension, aka a variant of the "File Fragment Reading via .HTR" vulnerability.

Remediation

Check the references section for vendor advisories and patches from microsoft. Update internet_information_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refmarc.info/?l=bugtraq&m=97897954625305&w=2Refwww.securityfocus.com/bid/2313Refdocs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-004Refexchange.xforce.ibmcloud.com/vulnerabilities/5903Refmarc.info/?l=bugtraq&m=97897954625305&w=2Refwww.securityfocus.com/bid/2313Refdocs.microsoft.com/en-us/security-updates/securitybulletins/2001/ms01-004Refexchange.xforce.ibmcloud.com/vulnerabilities/5903

How CyberStrike helps

Frequently asked questions

What is CVE-2001-0004?

CVE-2001-0004 is a medium-severity vulnerability affecting microsoft internet_information_server. It was published on February 12, 2001 and has a CVSS 2.0 base score of 5.0 (MEDIUM).

How severe is CVE-2001-0004?

This vulnerability has a CVSS 2.0 base score of 5.0, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2001-0004?

Check the references section for vendor advisories and patches from microsoft. Update internet_information_server to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2001-0004?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2001-0004 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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