QID 356248

redis is an open source, in-memory database that persists on disk.
In affected versions specially crafted lua scripts executing in redis can cause the heap-based lua stack to be overflowed, due to incomplete checks for this condition.
This can result with heap corruption and potentially remote code execution.
This problem exists in all versions of redis with lua scripting support, starting from 2.6.
The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14.
For users unable to update an additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from executing lua scripts.
This can be done using acl to restrict eval and evalsha commands. (
( CVE-2021-32626) 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. (
( CVE-2021-32627) redis is an open source, in-memory database that persists on disk.
The problem is fixed in redis versions 6.2.6, 6.0.16, 5.0.14.
( CVE-2021-41099)

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.