Tên: Exposure of File Descriptor to Unintended Control Sphere

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.

Thông tin chung

Chi tiết nền tảng

Các cách xuất hiện

Implementation : 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.
Implementation : REALIZATION: This weakness is caused during implementation of an architectural security tactic.

Nền tảng áp dụng

Ngôn ngữ

Tên: C (Undetermined)
Lớp: Not Language-Specific (Undetermined)

Hệ điều hành

Lớp: Unix (Undetermined)

Hậu quả phổ biến

Phạm vi	Tác động	Khả năng xảy ra
Confidentiality Integrity	Read Application Data, Modify Application Data

Ví dụ đã quan sát

Tài liệu tham khảo	Mô tả
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.

Phương pháp phát hiện

Automated Static Analysis

Automated static analysis, commonly referred to as Static Application Security Testing (SAST), can find some instances of this weakness by analyzing source code (or binary/compiled code) without having to execute it. Typically, this is done by building a model of data flow and control flow, then searching for potentially-vulnerable patterns that connect "sources" (origins of input) with "sinks" (destinations where the data interacts with external components, a lower layer such as the OS, etc.)
Hiệu quả : High

Ghi chú ánh xạ lỗ hổng

Lý do : This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Bình luận : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Tài liệu tham khảo

REF-392

File descriptors and setuid applications
Paul Roberts.
https://blogs.oracle.com/paulr/entry/file_descriptors_and_setuid_applications

REF-393

Introduction to Secure Coding Guide
Apple.
https://developer.apple.com/library/archive/documentation/Security/Conceptual/SecureCodingGuide/Articles/AccessControl.html

Gửi

Tên	Tổ chức	Ngày	Ngày phát hành	Version
PLOVER		2006-07-19 +00:00	2006-07-19 +00:00	Draft 3

Sửa đổi

Tên	Tổ chức	Ngày	Bình luận
Eric Dalci	Cigital	2008-07-01 +00:00	updated Time_of_Introduction
CWE Content Team	MITRE	2008-09-08 +00:00	updated Applicable_Platforms, Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2008-11-24 +00:00	updated Affected_Resources, Observed_Examples, Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2011-03-29 +00:00	updated Name
CWE Content Team	MITRE	2011-06-01 +00:00	updated Common_Consequences
CWE Content Team	MITRE	2011-06-27 +00:00	updated Common_Consequences
CWE Content Team	MITRE	2011-09-13 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2012-05-11 +00:00	updated Relationships
CWE Content Team	MITRE	2013-02-21 +00:00	updated Alternate_Terms, Description, Name, Observed_Examples, References
CWE Content Team	MITRE	2014-07-30 +00:00	updated Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2017-11-08 +00:00	updated Affected_Resources, Applicable_Platforms, Modes_of_Introduction, References, Relationships, Taxonomy_Mappings
CWE Content Team	MITRE	2020-02-24 +00:00	updated Relationships
CWE Content Team	MITRE	2023-04-27 +00:00	updated References, Relationships, Time_of_Introduction
CWE Content Team	MITRE	2023-06-29 +00:00	updated Mapping_Notes
CWE Content Team	MITRE	2025-04-03 +00:00	updated Applicable_Platforms
CWE Content Team	MITRE	2025-09-09 +00:00	updated Functional_Areas
CWE Content Team	MITRE	2025-12-11 +00:00	updated Detection_Factors, Weakness_Ordinalities
CWE Content Team	MITRE	2026-10-28 +00:00	updated Background_Details, Description, Modes_of_Introduction, Name

Chi tiết CWE-403

CWE-403