CWE-567: Unsynchronized Access to Shared Data in a Multithreaded Context

ID CWE-567

Abstraction Base

Structure Simple

Status Draft

Number of CVEs 2

The product does not properly synchronize shared data, such as static variables across threads, which can lead to undefined behavior and unpredictable data changes.

Within servlets, shared static variables are not protected from concurrent access, but servlets are multithreaded. This is a typical programming mistake in J2EE applications, since the multithreading is handled by the framework. When a shared variable can be influenced by an attacker, one thread could wind up modifying the variable to contain data that is not valid for a different thread that is also using the data within the variable.

Note that this weakness is not unique to servlets.

Modes of Introduction

Phase	Note
Implementation

Applicable Platforms

Type	Class	Name	Prevalence
Language		Java

Relationships

View			Weakness
# ID	View	Status	# ID	Name	Abstraction	Structure	Status
CWE-1000	Research Concepts	Draft	CWE-820	Missing Synchronization	Base	Simple	Incomplete
CWE-1305	CISQ Quality Measures (2020)	Incomplete	CWE-662	Improper Synchronization	Class	Simple	Draft
CWE-1340	CISQ Data Protection Measures	Incomplete	CWE-662	Improper Synchronization	Class	Simple	Draft
CWE-1000	Research Concepts	Draft	CWE-488	Exposure of Data Element to Wrong Session	Base	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-567

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