CWE-820 Detail

CWE-820

Missing Synchronization
Incomplete
2010-09-27 00:00 +00:00
2023-10-26 00:00 +00:00

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Missing Synchronization

The product utilizes a shared resource in a concurrent manner but does not attempt to synchronize access to the resource.

Extended Description

If access to a shared resource is not synchronized, then the resource may not be in a state that is expected by the product. This might lead to unexpected or insecure behaviors, especially if an attacker can influence the shared resource.

Informations

Common Consequences

Scope Impact Likelihood
Integrity
Confidentiality
Other
Modify Application Data, Read Application Data, Alter Execution Logic

Vulnerability Mapping Notes

Rationale : This CWE entry is at the Base level of abstraction, which is a preferred level of abstraction for mapping to the root causes of vulnerabilities.
Comments : Carefully read both the name and description to ensure that this mapping is an appropriate fit. Do not try to 'force' a mapping to a lower-level Base/Variant simply to comply with this preferred level of abstraction.

Notes

Deeper research is necessary for synchronization and related mechanisms, including locks, mutexes, semaphores, and other mechanisms. Multiple entries are dependent on this research, which includes relationships to concurrency, race conditions, reentrant functions, etc. CWE-662 and its children - including CWE-667, CWE-820, CWE-821, and others - may need to be modified significantly, along with their relationships.

Submission

Name Organization Date Date Release Version
CWE Content Team MITRE 2010-08-06 +00:00 2010-09-27 +00:00 1.10

Modifications

Name Organization Date Comment
CWE Content Team MITRE 2010-12-13 +00:00 updated Demonstrative_Examples, Relationships
CWE Content Team MITRE 2011-06-01 +00:00 updated Common_Consequences, Relationships, Taxonomy_Mappings
CWE Content Team MITRE 2013-07-17 +00:00 updated Relationships
CWE Content Team MITRE 2017-11-08 +00:00 updated Demonstrative_Examples
CWE Content Team MITRE 2019-01-03 +00:00 updated Relationships, Taxonomy_Mappings
CWE Content Team MITRE 2019-09-23 +00:00 updated Maintenance_Notes
CWE Content Team MITRE 2020-02-24 +00:00 updated Relationships
CWE Content Team MITRE 2020-08-20 +00:00 updated Relationships
CWE Content Team MITRE 2020-12-10 +00:00 updated Relationships
CWE Content Team MITRE 2023-01-31 +00:00 updated Description
CWE Content Team MITRE 2023-04-27 +00:00 updated Relationships
CWE Content Team MITRE 2023-06-29 +00:00 updated Mapping_Notes
CWE Content Team MITRE 2023-10-26 +00:00 updated Demonstrative_Examples
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