CWE-363

Race Condition Enabling Link Following
AI Translation Available

The product checks the status of a file or directory before accessing it, which produces a race condition in which the file can be replaced with a link before the access is performed, causing the product to access the wrong file.

Status
draft
Abstraction
base

While developers might expect that there is a very narrow time window between the time of check and time of use, there is still a race condition. An attacker could cause the product to slow down (e.g. with memory consumption), causing the time window to become larger. Alternately, in some situations, the attacker could win the race by performing a large number of attacks.

Common Consequences

confidentiality integrity
Impacts
read files or directories modify files or directories

Detection Methods

automated static analysis

Potential Mitigations