Improper Handling of Windows Device Names

Opis

The product constructs pathnames from user input, but it does not handle or incorrectly handles a pathname containing a Windows device name such as AUX or CON. This typically leads to denial of service or an information exposure when the application attempts to process the pathname as a regular file.

Not properly handling virtual filenames (e.g. AUX, CON, PRN, COM1, LPT1) can result in different types of vulnerabilities. In some cases an attacker can request a device via injection of a virtual filename in a URL, which may cause an error that leads to a denial of service or an error page that reveals sensitive information. A product that allows device names to bypass filtering runs the risk of an attacker injecting malicious code in a file with the name of a device.

Skutki

• Availability, Confidentiality, Other

  DoS: Crash, Exit, or Restart; Read Application Data; Other

Zapobieganie

• Implementation

  Be familiar with the device names in the operating system where your system is deployed. Check input for these device names.

Przykłady podatności

• CVE-2002-0106 Server allows remote attackers to cause a denial of service via a series of requests to .JSP files that contain an MS-DOS device name.
• CVE-2002-0200 Server allows remote attackers to cause a denial of service via an HTTP request for an MS-DOS device name.
• CVE-2002-1052 Product allows remote attackers to use MS-DOS device names in HTTP requests to cause a denial of service or obtain the physical path of the server.
• CVE-2001-0493 Server allows remote attackers to cause a denial of service via a URL that contains an MS-DOS device name.
• CVE-2001-0558 Server allows a remote attacker to create a denial of service via a URL request which includes a MS-DOS device name.
• CVE-2000-0168 Microsoft Windows 9x operating systems allow an attacker to cause a denial of service via a pathname that includes file device names, aka the "DOS Device in Path Name" vulnerability.
• CVE-2001-0492 Server allows remote attackers to determine the physical path of the server via a URL containing MS-DOS device names.
• CVE-2004-0552 Product does not properly handle files whose names contain reserved MS-DOS device names, which can allow malicious code to bypass detection when it is installed, copied, or executed.
• CVE-2005-2195 Server allows remote attackers to cause a denial of service (application crash) via a URL with a filename containing a .cgi extension and an MS-DOS device name.

Słabość nadrzędna

• CWE-66 Improper Handling of File Names that Identify Virtual Resources

Kiedy powstaje

• Implementation
• Operation

Dotyczy

Not Language-Specific, Windows

Źródła

1. Writing Secure Code — Michael Howard, David LeBlanc, Microsoft Press, 2002
2. The Art of Software Security Assessment — Mark Dowd, John McDonald, Justin Schuh, Chapter 11, "Device Files", Page 666, Addison Wesley, 2006