Vulnerability Details : CVE-2009-2521

Public exploit exists!
Stack consumption vulnerability in the FTP Service in Microsoft Internet Information Services (IIS) 5.0 through 7.0 allows remote authenticated users to cause a denial of service (daemon crash) via a list (ls) -R command containing a wildcard that references a subdirectory, followed by a .. (dot dot), aka "IIS FTP Service DoS Vulnerability."
Published 2009-09-04 10:30:02
Updated 2020-11-23 19:50:51
Source Microsoft Corporation
View at NVD,   CVE.org
Vulnerability category: Denial of service

Products affected by CVE-2009-2521

Threat overview for CVE-2009-2521

Top countries where our scanners detected CVE-2009-2521
Top open port discovered on systems with this issue 80
IPs affected by CVE-2009-2521 169,005
Threat actors abusing to this issue? Yes
Find out if you* are affected by CVE-2009-2521!
*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2009-2521

EPSS FAQ
93.75%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 99 %
Percentile, the proportion of vulnerabilities that are scored at or less

Metasploit modules for CVE-2009-2521

  • Microsoft IIS FTP Server LIST Stack Exhaustion
    Disclosure Date: 2009-09-03
    First seen: 2020-04-26
    auxiliary/dos/windows/ftp/iis_list_exhaustion
    This module triggers Denial of Service condition in the Microsoft Internet Information Services (IIS) FTP Server 5.0 through 7.0 via a list (ls) -R command containing a wildcard. For this exploit to work in most cases, you need 1) a valid ftp account: either read-o

CVSS scores for CVE-2009-2521

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.0
 MEDIUM AV:N/AC:L/Au:N/C:N/I:N/A:P
10.0
2.9
 NIST

CWE ids for CVE-2009-2521

  • The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2009-2521

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