CWE-39: Path Traversal: 'C:dirname'

Variant Draft Simple

CWE版本: 4.18

更新日期: 2025-09-09

弱点描述

The product accepts input that contains a drive letter or Windows volume letter ('C:dirname') that potentially redirects access to an unintended location or arbitrary file.

常见后果

影响范围: Integrity Confidentiality Availability

技术影响: Execute Unauthorized Code or Commands

说明: The attacker may be able to create or overwrite critical files that are used to execute code, such as programs or libraries.

影响范围: Integrity

技术影响: Modify Files or Directories

说明: The attacker may be able to overwrite or create critical files, such as programs, libraries, or important data. If the targeted file is used for a security mechanism, then the attacker may be able to bypass that mechanism. For example, appending a new account at the end of a password file may allow an attacker to bypass authentication.

影响范围: Confidentiality

技术影响: Read Files or Directories

说明: The attacker may be able read the contents of unexpected files and expose sensitive data. If the targeted file is used for a security mechanism, then the attacker may be able to bypass that mechanism. For example, by reading a password file, the attacker could conduct brute force password guessing attacks in order to break into an account on the system.

影响范围: Availability

技术影响: DoS: Crash, Exit, or Restart

说明: The attacker may be able to overwrite, delete, or corrupt unexpected critical files such as programs, libraries, or important data. This may prevent the software from working at all and in the case of a protection mechanisms such as authentication, it has the potential to lockout every user of the software.

潜在缓解措施

阶段: Implementation

策略: Input Validation

有效性: High

阶段: Implementation

策略: Input Validation

描述: Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.

观察示例

参考: CVE-2001-0038

Remote attackers can read arbitrary files by specifying the drive letter in the requested URL.

参考: CVE-2001-0255

FTP server allows remote attackers to list arbitrary directories by using the "ls" command and including the drive letter name (e.g. C:) in the requested pathname.

参考: CVE-2001-0687

FTP server allows a remote attacker to retrieve privileged system information by specifying arbitrary paths.

参考: CVE-2001-0933

FTP server allows remote attackers to list the contents of arbitrary drives via a ls command that includes the drive letter as an argument.

参考: CVE-2002-0466

Server allows remote attackers to browse arbitrary directories via a full pathname in the arguments to certain dynamic pages.

参考: CVE-2002-1483

Remote attackers can read arbitrary files via an HTTP request whose argument is a filename of the form "C:" (Drive letter), "//absolute/path", or ".." .

参考: CVE-2004-2488

FTP server read/access arbitrary files using "C:\" filenames

引入模式

阶段 说明
Implementation -

适用平台

编程语言
Not Language-Specific (Undetermined)

分类映射

分类名称 条目ID 条目名称 映射适配度
PLOVER - 'C:dirname' or C: (Windows volume or 'drive letter') -
CERT C Secure Coding FIO05-C Identify files using multiple file attributes -
Software Fault Patterns SFP16 Path Traversal -
关键信息

CWE ID: CWE-39

抽象级别: Variant

结构: Simple

状态: Draft

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