CWE-62: UNIX Hard Link
ID
CWE-62
Abstraction
Variant
Structure
Simple
Status
Incomplete
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.
Modes of Introduction
| Phase | Note |
|---|---|
| Implementation |
Applicable Platforms
| Type | Class | Name | Prevalence |
|---|---|---|---|
| Language | Not Language-Specific | ||
| Operating_system | Unix |
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