CVE-2021-32627

Redis is an open source, in-memory database that persists on disk. In
affected versions an integer overflow bug in Redis can be exploited to
corrupt the heap and potentially result with remote code execution. The
vulnerability involves changing the default proto-max-bulk-len and
client-query-buffer-limit configuration parameters to very large values and
constructing specially crafted very large stream elements. The problem is
fixed in Redis 6.2.6, 6.0.16 and 5.0.14. For users unable to upgrade an
additional workaround to mitigate the problem without patching the
redis-server executable is to prevent users from modifying the
proto-max-bulk-len configuration parameter. This can be done using ACL to
restrict unprivileged users from using the CONFIG SET command.