CVE-2022-24834
Description
A heap-based buffer overflow flaw was found in Redis. This flaw allows a local authenticated attacker user or attacker to execute a specially crafted Lua script in Redis. This attack triggers a heap overflow in the cjson and cmsgpack libraries, resulting in heap corruption and potential remote code execution.
Statement
The problem exists in all versions of Redis with Lua scripting support, starting from 2.6, and affects only authenticated and authorized users.
Mitigation
Prevent users from executing Lua scripts. This can be done using ACL to restrict EVAL and EVALSHA commands.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 7 | 8.8 | 7 |
| Attack Vector | Local | Network | Local |
| Attack Complexity | High | Low | High |
| Privileges Required | Low | Low | Low |
| User Interaction | None | None | None |
| Scope | Unchanged | Unchanged | Unchanged |
| Confidentiality | High | High | High |
| Integrity Impact | High | High | High |
| Availability Impact | High | High | High |
Vector
Red Hat: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
cve.org: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Red Hat CVSS v3 Score Explanation
A heap overflow corruption can only be exploited under certain conditions as per stated in https://github.com/redis/redis/security/advisories/GHSA-p8x2-9v9q-c838
Understanding the Weakness (CWE)
Integrity,Availability,Confidentiality
Technical Impact: Modify Memory; DoS: Crash, Exit, or Restart; Execute Unauthorized Code or Commands
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