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CWE-62 - UNIX Hard Link

CWE-62

  • Abstraction:
  • Variant
  • Structure:
  • Simple
  • Status:
  • Incomplete
Weakness Name

UNIX Hard Link

Description

The product, when opening a file or directory, does not sufficiently account for 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 product to operate on unauthorized files.

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. /etc/passwd). When the process opens the file, the attacker can assume the privileges of that process.

Common Consequences

Scope: Confidentiality, Integrity

Impact: Read Files or Directories, Modify Files or Directories

Related Weaknesses
  • Release Date:
  • 2006-07-19
  • Latest Modification Date:
  • 2024-07-16

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