CWE-662: Improper Synchronization

ID CWE-662

Abstraction Class

Structure Simple

Status Draft

Number of CVEs 58

The product utilizes multiple threads or processes to allow temporary access to a shared resource that can only be exclusive to one process at a time, but it does not properly synchronize these actions, which might cause simultaneous accesses of this resource by multiple threads or processes.

Synchronization refers to a variety of behaviors and mechanisms that allow two or more independently-operating processes or threads to ensure that they operate on shared resources in predictable ways that do not interfere with each other. Some shared resource operations cannot be executed atomically; that is, multiple steps must be guaranteed to execute sequentially, without any interference by other processes. Synchronization mechanisms vary widely, but they may include locking, mutexes, and semaphores. When a multi-step operation on a shared resource cannot be guaranteed to execute independent of interference, then the resulting behavior can be unpredictable. Improper synchronization could lead to data or memory corruption, denial of service, etc.

Modes of Introduction

Phase	Note
Architecture and Design
Implementation

Relationships

View			Weakness
# ID	View	Status	# ID	Name	Abstraction	Structure	Status
CWE-1000	Research Concepts	Draft	CWE-664	Improper Control of a Resource Through its Lifetime	Pillar	Simple	Draft
CWE-1000	Research Concepts	Draft	CWE-691	Insufficient Control Flow Management	Pillar	Simple	Draft
CWE-1000	Research Concepts	Draft	CWE-362	Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')	Class	Simple	Draft

Common Attack Pattern Enumeration and Classification (CAPEC)

The Common Attack Pattern Enumeration and Classification (CAPEC™) effort provides a publicly available catalog of common attack patterns that helps users understand how adversaries exploit weaknesses in applications and other cyber-enabled capabilities.

CAPEC at Mitre.org

# ID	Name	Weaknesses
CAPEC-25	Forced Deadlock	CWE-662
CAPEC-26	Leveraging Race Conditions	CWE-662
CAPEC-27	Leveraging Race Conditions via Symbolic Links	CWE-662
CAPEC-29	Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions	CWE-662

CVEs Published

Based on CVE published date

CVSS Severity

CVSS Severity - By Year

CVSS Base Score

# CVE	Description	CVSS	EPSS	EPSS Trend (30 days)	Affected Products	Weaknesses	Security Advisories	Exploits	PoC	Pubblication Date	Modification Date
# CVE	Description	CVSS	EPSS	EPSS Trend (30 days)	Affected Products	Weaknesses	Security Advisories	PoC	Pubblication Date	Modification Date