CWE-403 将文件描述符暴露给不受控制的范围（文件描述符泄露）

Exposure of File Descriptor to Unintended Control Sphere ('File Descriptor Leak')

结构: Simple

Abstraction: Base

状态: Draft

被利用可能性: unkown

基本描述

A process does not close sensitive file descriptors before invoking a child process, which allows the child to perform unauthorized I/O operations using those descriptors.

扩展描述

When a new process is forked or executed, the child process inherits any open file descriptors. When the child process has fewer privileges than the parent process, this might introduce a vulnerability if the child process can access the file descriptor but does not have the privileges to access the associated file.

相关缺陷

• cwe_Nature: ChildOf cwe_CWE_ID: 402 cwe_View_ID: 1000 cwe_Ordinal: Primary

• cwe_Nature: ChildOf cwe_CWE_ID: 402 cwe_View_ID: 699 cwe_Ordinal: Primary

适用平台

Language: {'cwe_Class': 'Language-Independent', 'cwe_Prevalence': 'Undetermined'}

Operating_System: {'cwe_Class': 'Unix', 'cwe_Prevalence': 'Undetermined'}

常见的影响

范围	影响	注释
['Confidentiality', 'Integrity']	['Read Application Data', 'Modify Application Data']

分析过的案例

标识	说明	链接
CVE-2003-0740	Server leaks a privileged file descriptor, allowing the server to be hijacked.	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0740
CVE-2004-1033	File descriptor leak allows read of restricted files.	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-1033
CVE-2000-0094	Access to restricted resource using modified file descriptor for stderr.	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2000-0094
CVE-2002-0638	Open file descriptor used as alternate channel in complex race condition.	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0638
CVE-2003-0489	Program does not fully drop privileges after creating a file descriptor, which allows access to the descriptor via a separate vulnerability.	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0489
CVE-2003-0937	User bypasses restrictions by obtaining a file descriptor then calling setuid program, which does not close the descriptor.	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0937
CVE-2004-2215	Terminal manager does not properly close file descriptors, allowing attackers to access terminals of other users.	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-2215
CVE-2006-5397	Module opens a file for reading twice, allowing attackers to read files.	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5397

分类映射

映射的分类名	ImNode ID	Fit	Mapped Node Name
PLOVER			UNIX file descriptor leak
CERT C Secure Coding	FIO42-C		Ensure files are properly closed when they are no longer needed
Software Fault Patterns	SFP23		Exposed Data

引用

• REF-392 File descriptors and setuid applications

• REF-393 Introduction to Secure Coding Guide

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