CWE-1096: Singleton Class Instance Creation without Proper Locking or Synchronization
The product implements a Singleton design pattern but does not use appropriate locking or other synchronization mechanism to ensure that the singleton class is only instantiated once.
View on MITREExtended Description
This issue can prevent the product from running reliably, e.g. by making the instantiation process non-thread-safe and introducing deadlock (CWE-833) or livelock conditions. If the relevant code is reachable by an attacker, then this reliability problem might introduce a vulnerability.
Technical Details
- Structure
- Simple
Applicable To
Security Consequences
Scope
Impact
Mitigation Strategies
No mitigation information available for this CWE.
Detection Methods
No detection method information available for this CWE.
Code Examples & CVEs
No examples or observed CVEs available for this CWE.
CWE Relationships
No relationship information available for this CWE.
Frequently Asked Questions
What is CWE-1096: Singleton Class Instance Creation without Proper Locking or Synchronization?+
CWE-1096: Singleton Class Instance Creation without Proper Locking or Synchronization is a Common Weakness Enumeration (CWE) entry maintained by MITRE. The product implements a Singleton design pattern but does not use appropriate locking or other synchronization mechanism to ensure that the singleton class is only instantiated once. This issue can prevent the product from running reliably, e.g. by making the instantiation process non-thread-safe and introducing deadlock (CWE-833) or livelock conditions. If the relevant code is reachable by an attacker, then this reliability problem might introduce a vulnerability.
What are the security consequences of Singleton Class Instance Creation without Proper Locking or Synchronization?+
If exploited, CWE-1096 (Singleton Class Instance Creation without Proper Locking or Synchronization) it can compromise Other, leading to outcomes such as Reduce Reliability.
What is the difference between a CWE and a CVE?+
A CWE (Common Weakness Enumeration) like CWE-1096 describes a category of software weakness — the underlying flaw type. A CVE (Common Vulnerabilities and Exposures) identifies a specific, real-world vulnerability in a particular product. In short, a CWE is the kind of mistake, and a CVE is an instance of that mistake being found in software.