CVE-2021-29477 Vulnerability in the STRALGO LCS command
An integer overflow in Redis STRALGO LCS command 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-2021-29477?
CVE-2021-29477 is a high-severity vulnerability in Fedoraproject Fedora, published on 4 May 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. The problem is fixed in version 6.2.3 and 6.0.13. 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.
Weakness: CWE-190
Which versions are affected by CVE-2021-29477?
It affects 2 products.
Linux distribution packages (6)
redis Red Hat:enterprise_linux:8::appstream | All versions | 0:6.0.9-3.module+el8.4.0+10984+ed187465 |
redis-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:6.0.9-3.module+el8.4.0+10984+ed187465 |
redis-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:6.0.9-3.module+el8.4.0+10984+ed187465 |
redis-devel Red Hat:enterprise_linux:8::appstream | All versions | 0:6.0.9-3.module+el8.4.0+10984+ed187465 |
redis-doc Red Hat:enterprise_linux:8::appstream | All versions | 0:6.0.9-3.module+el8.4.0+10984+ed187465 |
redis Rocky Linux:8 | All versions | 0:6.0.9-3.module+el8.4.0+395+8d498eeb |
Products include Fedoraproject Fedora, Redislabs Redis.
How do I fix CVE-2021-29477?
Upgrade to a fixed version.
Is CVE-2021-29477 being exploited?
There is no known exploitation of CVE-2021-29477 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALPINE-CVE-2021-29477, DEBIAN-CVE-2021-29477, GHSA-vqxj-26vj-996g, OESA-2022-1883, RHSA-2021:2034, RLSA-2021:2034.