Preface: Redis is a standard key-value store, like a dictionary, containing multiple keys, each with its unique value that can be retrieved or pinned. It is similar to a data structure server that relies on various key values. Redis has built-in replica functionality. It can hold keys to 512MB.

Background: The Redis SORT_RO command is a read-only variant of the SORT command. It allows us to sort lists, sets, and sorted sets. The SORT command enables us to have the sorted elements returned to the client, or stored in a separate key. But the SORT_RO command only allows us to have them returned to the client.

Vulnerability details: Redis is an in-memory database that persists on disk. Redis does not correctly identify keys accessed by `SORT_RO` and as a result may grant users executing this command access to keys that are not explicitly authorized by the ACL configuration. The problem exists in Redis 7.0 or newer and has been fixed in Redis 7.0.13 and 7.2.1. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Official announcement: For detail, please refer to the link – https://nvd.nist.gov/vuln/detail/CVE-2023-41053