CVE-2022-36021CWE-407

Redis string pattern matching can be abused to achieve Denial of Service

Medium · published March 1, 2023

Patch now

High probability of exploitation

CVSS calls it medium at 5.5. It sits in the 99.1th percentile for exploit probability.

CVSS v3.1

5.5

EPSS

60%

Percentile

99.1

In the wild

Unconfirmed

What it is

Redis is an in-memory database that persists on disk. Authenticated users can use string matching commands (like `SCAN` or `KEYS`) with a specially crafted pattern to trigger a denial-of-service attack on Redis, causing it to hang and consume 100% CPU time. The problem is fixed in Redis versions 6.0.18, 6.2.11, 7.0.9.

The record

Technical detail

CVSS v3.1: 5.5 · MEDIUM
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0: Not supplied
EPSS: 0.59769 · 99.1th percentile
Weakness: CWE-407 · Inefficient Algorithmic Complexity
Published: 2023-03-01T15:46Z

EPSS history

Timeline

01 MAR 15:46Z
Redis string pattern matching can be abused to achieve Denial of Service
cvelistv5