Impact

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.

Patches

The problem is fixed in Redis versions 6.0.18, 6.2.11, 7.0.9.

Credit

The issue has been identified by Tom Levy.

For more information

If you have any questions or comments about this advisory:

• Open an issue in the Redis repository
• Email us at redis@redis.io