Impact What kind of vulnerability is it? Who is impacted?
Bleve includes HTTP utilities under bleve/http package, that are used by its sample application. (https://github.com/blevesearch/bleve-explorer) These HTTP methods paves way for exploitation of a node’s filesystem where the bleve index resides, if the user has used bleve’s own HTTP (bleve/http) handlers for exposing the access to the indexes. For instance, the CreateIndexHandler (http/indexcreate.go) and DeleteIndexHandler (http/indexdelete.go) enable an attacker to create a bleve index (directory structure) anywhere where the user running the server has the write permissions and to delete recursively any directory owned by the same user account. Users who have used the bleve/http package for exposing access to bleve index without the explicit handling for the Role Based Access Controls(RBAC) of the index assets would be impacted.
Patches Has the problem been patched? What versions should users upgrade to?
No. The http package is purely intended to be used for demonstration purposes. And bleve is never designed to be handling the RBACs or it was ever advertised to be used in that way. Hence the collaborators of this project have decided to stay away from adding any authentication or authorization to bleve project at the moment.
Workarounds Is there a way for users to fix or remediate the vulnerability without upgrading?
The bleve/http package is mainly for demonstration purposes and it lacks exhaustive validation of the user inputs as well as any authentication and authorization measures. So it is recommended to not use that in production use cases.
For more information If you have any questions or comments about this advisory: Open an issue here. Email us at [mailto:security@couchbase.com, fts-team@couchbase.com].
An issue was discovered in Couchbase Server 7.6.x through 7.6.3. A user with the securityadminlocal role can create a new user in a group that has the admin role.
An issue was discovered in Couchbase Server through 7.1.4 before 7.1.5 and before 7.2.1. There are Unauthenticated RMI Service Ports Exposed in Analytics.
An issue was discovered in Couchbase Server before 7.2.4. cURL calls to /diag/eval are not sufficiently restricted.
An issue was discovered in Couchbase Sync Gateway 2.7.0 through 2.8.2. The bucket credentials used to read and write data in Couchbase Server were insecurely being stored in the metadata within sync documents written to the bucket. Users with read access could use these credentials to obtain write access. (This issue does not affect clusters where Sync Gateway is authenticated with X.509 client certificates. This issue also does not affect clusters where shared bucket access is not enabled on Sync Gateway.)
An issue was discovered in Couchbase Sync Gateway 3.x before 3.0.2. Admin credentials are not verified when using X.509 client-certificate authentication from Sync Gateway to Couchbase Server. When Sync Gateway is configured to authenticate with Couchbase Server using X.509 client certificates, the admin credentials provided to the Admin REST API are ignored, resulting in privilege escalation for unauthenticated users. The Public REST API is not impacted by this issue. A workaround is to replace X.509 certificate based authentication with Username and Password authentication inside the bootstrap configuration.
In Couchbase Sync Gateway 2.1.2, an attacker with access to the Sync Gateway’s public REST API was able to issue additional N1QL statements and extract sensitive data or call arbitrary N1QL functions through the parameters "startkey" and "endkey" on the "alldocs" endpoint. By issuing nested queries with CPU-intensive operations they may have been able to cause increased resource usage and denial of service conditions. The alldocs endpoint is not required for Couchbase Mobile replication and external access to this REST endpoint has been blocked to mitigate this issue. This issue has been fixed in versions 2.5.0 and 2.1.3.
In Couchbase Server 6.0.3 and Couchbase Sync Gateway through 2.7.0, the Cluster management, views, query, and full-text search endpoints are vulnerable to the Slowloris denial-of-service attack because they don't more aggressively terminate slow connections.
Couchbase Operator 2.2.x before 2.2.3 exposes Sensitive Information to an Unauthorized Actor. Secrets are not redacted in logs collected from Kubernetes environments.
End of life: 1/31/2023, Latest version: 6.6.6
End of life: 1/31/2023, Latest version: 6.6.6
End of life: 7/31/2020, Latest version: 6.0.5
End of life: 7/31/2020, Latest version: 6.0.5