CVE-2001-1186

EPSS

25.18%V4

Vector

Network

Published

2004-09-01
02h00 +00:00

Modified

2002-03-22
09h00 +00:00

Official links

CVE.org

NVD

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Criteria applied when sending the alert: compared with the last alert sent + differences in CISA, EPSS, CVSS, CWE, Solutions, CPE.

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Specified here a CVE ID as CVE-2025-1234

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CVE Descriptions

Microsoft IIS 5.0 allows remote attackers to cause a denial of service via an HTTP request with a content-length value that is larger than the size of the request, which prevents IIS from timing out the connection.

CVE Informations

Metrics

Metrics	Score	Severity	CVSS Vector	Source
V2	5		AV:N/AC:L/Au:N/C:N/I:N/A:P	nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

Date	EPSS V0	EPSS V1	EPSS V2 (> 2022-02-04)	EPSS V3 (> 2025-03-07)	EPSS V4 (> 2025-03-17)
2022-02-06	–	–	24.73%	–	–
2022-04-03	–	–	24.73%	–	–
2023-03-12	–	–	–	8.5%	–
2023-06-04	–	–	–	8.5%	–
2024-06-02	–	–	–	8.5%	–
2024-07-07	–	–	–	8.5%	–
2024-07-21	–	–	–	8.5%	–
2024-08-11	–	–	–	8.5%	–
2024-09-22	–	–	–	8.79%	–
2024-12-22	–	–	–	13.83%	–
2025-02-16	–	–	–	11.85%	–
2025-01-19	–	–	–	13.83%	–
2025-02-16	–	–	–	11.85%	–
2025-03-18	–	–	–	–	39.73%
2025-03-30	–	–	–	–	25.18%
2025-03-30	–	–	–	–	25.18,%

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

EPSS First.org

Date	Percentile
2022-02-06	95%
2022-04-03	97%
2023-03-12	93%
2023-06-04	94%
2024-06-02	94%
2024-07-07	95%
2024-07-21	94%
2024-08-11	95%
2024-09-22	95%
2024-12-22	96%
2025-02-16	95%
2025-01-19	96%
2025-02-16	95%
2025-03-18	97%
2025-03-30	96%
2025-03-30	96%

Exploit information

Exploit Database EDB-ID : 21177

Publication date : 2001-12-10 23h00 +00:00
Author : Ivan Hernandez Puga
EDB Verified : Yes

source: https://www.securityfocus.com/bid/3667/info Microsoft IIS 5.0 may be prone to a denial of service condition when sent a specially crafted malformed HTTP GET header. If an IIS 5.0 web server is sent a crafted HTTP GET request which contains a falsified and excessive "Content-Length" field, it behaves in an unusual manner. The server keeps the connection open and does not time out, but does not respond otherwise. It is possible that this may be used to cause a denial of service to the web server. The following HTTP GET Header, containing a falsified Content-Length field, is sufficient to cause the unexpected behavior: GET /testfile HTTP/1.1 Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-excel, application/vnd.ms-powerpoint, application/msword, */* Accept-Language: en-us Accept-Encoding: gzip, deflate User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0) Host: 192.168.0.10 Connection: Keep-Alive Content-Length: 5300643 Authorization: Basic