CWE-65 Windows硬链接

Windows Hard Link

结构: Simple

Abstraction: Variant

状态: Incomplete

被利用可能性: unkown

基本描述

The software, when opening a file or directory, does not sufficiently handle when the name is associated with a hard link to a target that is outside of the intended control sphere. This could allow an attacker to cause the software to operate on unauthorized files.

扩展描述

Failure for a system to check for hard links can result in vulnerability to different types of attacks. For example, an attacker can escalate their privileges if a file used by a privileged program is replaced with a hard link to a sensitive file (e.g. AUTOEXEC.BAT). When the process opens the file, the attacker can assume the privileges of that process, or prevent the program from accurately processing data.

相关缺陷

• cwe_Nature: ChildOf cwe_CWE_ID: 59 cwe_View_ID: 1000 cwe_Ordinal: Primary

• cwe_Nature: ChildOf cwe_CWE_ID: 59 cwe_View_ID: 699 cwe_Ordinal: Primary

适用平台

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

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

常见的影响

范围	影响	注释
['Confidentiality', 'Integrity']	['Read Files or Directories', 'Modify Files or Directories']

可能的缓解方案

MIT-48.1 Architecture and Design

策略: Separation of Privilege

Follow the principle of least privilege when assigning access rights to entities in a software system.
Denying access to a file can prevent an attacker from replacing that file with a link to a sensitive file. Ensure good compartmentalization in the system to provide protected areas that can be trusted.

分析过的案例

标识	说明	链接
CVE-2002-0725	File system allows local attackers to hide file usage activities via a hard link to the target file, which causes the link to be recorded in the audit trail instead of the target file.	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0725
CVE-2003-0844	Web server plugin allows local users to overwrite arbitrary files via a symlink attack on predictable temporary filenames.	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2003-0844

Notes

分类映射

映射的分类名	ImNode ID	Fit	Mapped Node Name
PLOVER			Windows hard link
CERT C Secure Coding	FIO05-C		Identify files using multiple file attributes
Software Fault Patterns	SFP18		Link in resource name resolution

引用

• REF-62 The Art of Software Security Assessment

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