CWE-432

Base Abstraction Level
Pillar — Highest-level weakness category
Class — Abstract, language-independent
Base — Specific enough to detect
Variant — Tied to specific technology
Compound — Requires multiple weaknesses Draft MITRE CWE Status
Stable — Fully reviewed and complete
Draft — Under development, may change
Incomplete — Partially defined by MITRE
Deprecated — No longer recommended
Obsolete — Replaced by another CWE
Dangerous Signal Handler not Disabled During Sensitive Operations

Description

The product uses a signal handler that shares state with other signal handlers, but it does not properly mask or prevent those signal handlers from being invoked while the original signal handler is still running.

During the execution of a signal handler, it can be interrupted by another handler when a different signal is sent. If the two handlers share state - such as global variables - then an attacker can corrupt the state by sending another signal before the first handler has completed execution.

Consequences

Integrity — Modify Application Data

Mitigations

Phase: Implementation

Turn off dangerous handlers when performing sensitive operations.