CVE-2021-32625 Redis vulnerability in STRALGO LCS on 32-bit systems
Integer overflow in Redis STRALGO LCS command on 32-bit systems allows heap corruption and potential remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-32625?
CVE-2021-32625 is a high-severity vulnerability in Fedoraproject Fedora, published on 2 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker. An integer overflow bug in Redis version 6.0 or newer, could be exploited using the STRALGO LCS command to corrupt the heap and potentially result with remote code execution. This is a result of an incomplete fix by CVE-2021-29477. The problem is fixed in version 6.2.4 and 6.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to use ACL configuration to prevent clients from using the STRALGO LCS command. On 64 bit systems which have the fixes of CVE-2021-29477 (6.2.3 or 6.0.13), it is sufficient to make sure that the proto-max-bulk-len config parameter is smaller than 2GB (default is 512MB).
Which versions are affected by CVE-2021-32625?
It affects 2 products.
Linux distribution packages (4)
redis SUSE:Linux Enterprise Module for Server Applications 15 SP2 | All versions | 6.0.14-6.5.1 |
redis SUSE:Linux Enterprise Module for Server Applications 15 SP3 | All versions | 6.0.14-6.5.1 |
redis openSUSE:Leap 15.2 | All versions | 6.0.14-lp152.2.6.1 |
redis openSUSE:Leap 15.3 | All versions | 6.0.14-6.5.1 |
Products include Fedoraproject Fedora, Redislabs Redis.
How do I fix CVE-2021-32625?
Upgrade to a fixed version.
Is CVE-2021-32625 being exploited?
There is no known exploitation of CVE-2021-32625 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALPINE-CVE-2021-32625, CLEANSTART-2026-CO90102, DEBIAN-CVE-2021-32625, GHSA-46cp-x4x9-6pfq, SUSE-SU-2021:2294-1, UBUNTU-CVE-2021-32625 and 2 more.