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Vulnerability Score 5.0 5.0
CVE Id CVE-2001-0004
Last Modified 05 Sep 2008 04:23:01
Published 12 Feb 2001 12:00:00
Confidentiality Impact PARTIAL PARTIAL
Integrity Impact NONE NONE
Availability Impact NONE NONE
Access Vector NETWORK
Access Complexity LOW
Authentication NONE



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.

Vulnerable Systems


  • Microsoft Internet Information Server 4.0

  • Microsoft Internet Information Server 5.0


MS - MS01-004

BUGTRAQ - 20010108 IIS 5.0 allows viewing files using %3F+.htr

XF - iis-read-files(5903)

BID - 2313

Last Updated: 27 May 2016 10:36:05