CVE-2023-23613: Field-level security issue with .keyword fields in OpenSearch
Advisory title: Field-level security issue with .keyword fields
Affected versions: OpenSearch 1.0.0-1.3.7 and 2.0.0-2.4.1
Patched versions: OpenSearch 1.3.8 and 2.5.0
Impact: There is an issue in the implementation of field-level security (FLS) and field masking where rules written to explicitly exclude fields are not correctly applied for certain queries that rely on their auto-generated .keyword fields.
This issue is only present for authenticated users with read access to the indexes containing the restricted fields.
Workaround: FLS rules that use explicit exclusions can be written to grant explicit access instead. Policies authored in this way are not subject to this issue.
Patches: OpenSearch versions 1.3.8 and 2.5.0 contain a fix for this issue.
For more information: If you have any questions or comments about this advisory, please contact AWS/Amazon Security via our issue reporting page (https://aws.amazon.com/security/vulnerability-reporting/) or directly via email to aws-security@amazon.com. Please do not create a public GitHub issue.
Other sources
OpenSearch could allow a remote authenticated attacker to obtain sensitive information, caused by the insertion of sensitive information into metadata. By sending a specially-crafted request, an attacker could exploit this vulnerability to obtain sensitive information, and use this information to launch further attacks against the affected system.
— IBM
OpenSearch is an open source distributed and RESTful search engine. In affected versions there is an issue in the implementation of field-level security (FLS) and field masking where rules written to explicitly exclude fields are not correctly applied for certain queries that rely on their auto-generated .keyword fields. This issue is only present for authenticated users with read access to the indexes containing the restricted fields. This may expose data which may otherwise not be accessible to the user. OpenSearch 1.0.0-1.3.7 and 2.0.0-2.4.1 are affected. Users are advised to upgrade to OpenSearch 1.3.8 or 2.5.0. Users unable to upgrade may write explicit exclusion rules as a workaround. Policies authored in this way are not subject to this issue.
Affected Software
Event History
Frequently Asked Questions
What is the vulnerability ID of this OpenSearch issue?
The vulnerability ID of this OpenSearch issue is CVE-2023-23613.
What is OpenSearch?
OpenSearch is an open source distributed and RESTful search engine.
What is the severity rating of CVE-2023-23613?
The severity rating of CVE-2023-23613 is medium (6.5).
How does CVE-2023-23613 affect OpenSearch?
CVE-2023-23613 affects OpenSearch by causing an issue in the implementation of field-level security (FLS) and field masking.
What is the affected software version range of CVE-2023-23613?
CVE-2023-23613 affects Amazon Opensearch versions 1.0.0 to 2.5.0.
How can I fix CVE-2023-23613?
To fix CVE-2023-23613, it is recommended to upgrade to a version of Amazon Opensearch that is not affected by the vulnerability.