CVE-2022-24735 Information

Description

Redis is an in-memory database that persists on disk. By exploiting weaknesses in the Lua script execution environment an attacker with access to Redis prior to version 7.0.0 or 6.2.7 can inject Lua code that will execute with the (potentially higher) privileges of another Redis user. The Lua script execution environment in Redis provides some measures that prevent a script from creating side effects that persist and can affect the execution of the same or different script at a later time. Several weaknesses of these measures have been publicly known for a long time but they had no security impact as the Redis security model did not endorse the concept of users or privileges. With the introduction of ACLs in Redis 6.0 these weaknesses can be exploited by a less privileged users to inject Lua code that will execute at a later time when a privileged user executes a Lua script. The problem is fixed in Redis versions 7.0.0 and 6.2.7. An additional workaround to mitigate this problem without patching the redis-server executable if Lua scripting is not being used is to block access to SCRIPT LOAD and EVAL commands using ACL rules.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Reference

https://github.com/redis/redis/pull/10651 https://github.com/redis/redis/security/advisories/GHSA-647m-2wmq-qmvq https://github.com/redis/redis/releases/tag/7.0.0 https://github.com/redis/redis/releases/tag/6.2.7 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VPYKSG7LKUJGVM2P72EHXKVRVRWHLORX/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/J4ZK3675DGHVVDOFLJN7WX6YYH27GPMK/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WSTPUCAPBRHIFPSCOURR4OYX4E2OISAF/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8