QID 356511

Redis is an in-memory database that persists on disk.
A vulnerability involving out-of-bounds read and integer overflow to buffer overflow exists starting with version 2.2 and prior to versions 5.0.13, 6.0.15, and 6.2.5.
On 32-bit systems, redis `*bit*` command are vulnerable to integer overflow that can potentially be exploited to corrupt the heap, leak arbitrary heap contents or trigger remote code execution.
The vulnerability involves changing the default `proto-max-bulk-len` configuration parameter to a very large value and constructing specially crafted commands bit commands.
This problem only affects redis on 32-bit platforms, or compiled as a 32-bit binary.
Redis versions 5.0.`3m 6.0.15, and 6.2.5 contain patches for this issue.
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-2021-32761)

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