CWE-59

Improper Link Resolution Before File Access ('Link Following')
AI Translation Available

The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

Status
draft
Abstraction
base
Likelihood
medium
Windows Unix

Common Consequences

confidentiality integrity access control other
Impacts
read files or directories modify files or directories bypass protection mechanism execute unauthorized code or commands

Detection Methods

automated static analysis - binary or bytecode manual static analysis - binary or bytecode dynamic analysis with automated results interpretation dynamic analysis with manual results interpretation manual static analysis - source code automated static analysis - source code architecture or design review

Potential Mitigations

Phases:
architecture and design
Descriptions:
• 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.

Functional Areas

file processing