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


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.


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.


  • 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


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

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


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


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


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