CVE-2023-28856 `HINCRBYFLOAT` can be used to crash a redis-server process
Authenticated users can crash the Redis server by using the HINCRBYFLOAT command to create an invalid hash field.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-28856?
CVE-2023-28856 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 18 Apr 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Redis is an open source, in-memory database that persists on disk. Authenticated users can use the `HINCRBYFLOAT` command to create an invalid hash field that will crash Redis on access in affected versions. This issue has been addressed in in versions 7.0.11, 6.2.12, and 6.0.19. Users are advised to upgrade. There are no known workarounds for this issue.
Which versions are affected by CVE-2023-28856?
3 open source packages ship an affected version, including keydb, redis and valkey. It affects 3 products.
| Package | Affected | Fixed in |
|---|---|---|
keydb Bitnami | All versions | 6.0.19, 6.2.12, 7.0.11 |
redis Bitnami | All versions | 6.0.19, 6.2.12, 7.0.11 |
valkey Bitnami | All versions | 6.0.19, 6.2.12, 7.0.11 |
Products include Debian Debian Linux, Fedoraproject Fedora, Redis Redis.
How do I fix CVE-2023-28856?
Upgrade keydb to a fixed version for your release line: 6.0.19, 6.2.12 or 7.0.11.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2023-28856 being exploited?
There is no known exploitation of CVE-2023-28856 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-26290, BIT-keydb-2023-28856, BIT-redis-2023-28856, BIT-valkey-2023-28856, DEBIAN-CVE-2023-28856, DLA-3396-1 and 4 more.