COMMON WEAKNESS ENUMERATIONIncomplete

CWE-67

Improper Handling of Windows Device Names

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.

Soyutlama

Variant

Yapı

Simple

Sömürü İhtimali

High

Problemi anla

Problem nedir?

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.

Genişletilmiş açıklama

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.

Kök neden

Problem nasıl ve ne zaman oluşur?

Yaşam döngüsü evresi

Implementation

Yaşam döngüsü evresi

Operation

Historically, there was a bug in the Windows operating system that caused a blue screen of death. Even after that issue was fixed DOS device names continue to be a factor.

Risk

Başarılı sömürü neye yol açar?

DoS: Crash, Exit, or RestartRead Application DataOther

Etkilenen güvenlik alanları: Availability, Confidentiality, Other

Savunma

Nasıl önlenir ve çözülür?

Implementation

Uygulama aşaması savunması

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