OpenSearch has issue with fine-grained access control of indices backing data streams

2023-03-0720:04:42

Google

osv.dev

opensearch

fine-grained access control

indices

data streams

access authorization

authenticated users

privileged users

patches

security advisory

CVSS3

6.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

LOW

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

EPSS

0.001

Percentile

32.8%

JSON

Impact

There is an issue with the implementation of fine-grained access control rules (document-level security, field-level security and field masking) where they are not correctly applied to the indices that back data streams potentially leading to incorrect access authorization. This issue can only be triggered by authenticated users authorized to read those data streams which are backed by the impacted indexes. Additionally, existing privileged users cannot access random indexes within these clusters; they can only access indexes to which they have already been granted permission.

Patches

OpenSearch 1.3.7 and 2.4.0 contain a fix for this issue.

Workarounds

There is no recommended work around.

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 [email protected]. Please do not create a public GitHub issue.