CVE-2021-41099

An integer overflow issue was found in redis in the underlying string library. The vulnerability involves changing the default "proto-max-bulk-len" configuration parameter to a very large value and constructing specially crafted network payloads or commands. This flaw allows a remote attacker to corrupt the heap and potentially trigger remote code execution. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

The flaw can be mitigated by disallowing usage of the CONFIG SET command via ACL configuration. This will prevent clients from setting the proto-max-bulk-len configuration parameter. Please see https://redis.io/topics/acl for more information on how to do this.