CVE-2009-4444

medium Microsoft
CVSS v3 Base Score
6.0
AV:N/AC:M/Au:S/C:P/I:P/A:P
EPSS Score
58.6%
Exploitation probability in 30 days
Top 2% most likely to be exploited
Attack Characteristics
Attack Vector
Network
Attack Complexity
M
Confidentiality
P
Integrity
P
Availability
P
Published: December 29, 2009 (5980 days ago)
Last Modified: April 23, 2026
Vendor: Microsoft
Source: NVD

Description

Microsoft Internet Information Services (IIS) 5.x and 6.x uses only the portion of a filename before a ; (semicolon) character to determine the file extension, which allows remote attackers to bypass intended extension restrictions of third-party upload applications via a filename with a (1) .asp, (2) .cer, or (3) .asa first extension, followed by a semicolon and a safe extension, as demonstrated by the use of asp.dll to handle a .asp;.jpg file.

CWE

NVD-CWE-noinfo

Affected Products

microsoft internet information services

References

🔗 blogs.technet.com 🔗 secunia.com 🔗 securitytracker.com 🔗 soroush.secproject.com 🔗 www.securityfocus.com