Headline
CVE-2022-36021: Redis string pattern matching can be abused to achieve Denial of Service
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.
Affected versions
All versions
Patched versions
6.0.18, 6.2.11, 7.0.9
Description
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 [email protected]
Related news
Gentoo Linux Security Advisory 202408-5 - Multiple vulnerabilities have been discovered in Redis, the worst of which may lead to a denial of service or possible remote code execution. Versions greater than or equal to 7.2.4 are affected.
Ubuntu Security Notice 6531-1 - Seiya Nakata and Yudai Fujiwara discovered that Redis incorrectly handled certain specially crafted Lua scripts. An attacker could possibly use this issue to cause heap corruption and execute arbitrary code. SeungHyun Lee discovered that Redis incorrectly handled specially crafted commands. An attacker could possibly use this issue to trigger an integer overflow, which might cause Redis to allocate impossible amounts of memory, resulting in a denial of service via an application crash.
Redis is an in-memory database that persists on disk. Authenticated users issuing specially crafted `SRANDMEMBER`, `ZRANDMEMBER`, and `HRANDFIELD` commands can trigger an integer overflow, resulting in a runtime assertion and termination of the Redis server process. This problem affects all Redis versions. Patches were released in Redis version(s) 6.0.18, 6.2.11 and 7.0.9.