Vulnerability Description
Redis is an open source, in-memory database that persists on disk. In affected versions specially crafted Lua scripts executing in Redis can cause the heap-based Lua stack to be overflowed, due to incomplete checks for this condition. This can result with heap corruption and potentially remote code execution. This problem exists in all versions of Redis with Lua scripting support, starting from 2.6. The problem is fixed in versions 6.2.6, 6.0.16 and 5.0.14. For users unable to update an additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from executing Lua scripts. This can be done using ACL to restrict EVAL and EVALSHA commands.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redis | Redis | >= 2.6, < 5.0.14 |
| Fedoraproject | Fedora | 33 |
| Netapp | Management Services For Element Software | - |
| Netapp | Management Services For Netapp Hci | - |
| Debian | Debian Linux | 10.0 |
| Oracle | Communications Operations Monitor | 4.3 |
Related Weaknesses (CWE)
References
- https://github.com/redis/redis/commit/666ed7facf4524bf6d19b11b20faa2cf93fdf591PatchThird Party Advisory
- https://github.com/redis/redis/security/advisories/GHSA-p486-xggp-782cThird Party Advisory
- https://lists.apache.org/thread.html/r75490c61c2cb7b6ae2c81238fd52ae13636c60435a
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202209-17Third Party Advisory
- https://security.netapp.com/advisory/ntap-20211104-0003/Third Party Advisory
- https://www.debian.org/security/2021/dsa-5001Third Party Advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlPatchThird Party Advisory
- https://github.com/redis/redis/commit/666ed7facf4524bf6d19b11b20faa2cf93fdf591PatchThird Party Advisory
- https://github.com/redis/redis/security/advisories/GHSA-p486-xggp-782cThird Party Advisory
- https://lists.apache.org/thread.html/r75490c61c2cb7b6ae2c81238fd52ae13636c60435a
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
FAQ
What is CVE-2021-32626?
CVE-2021-32626 is a vulnerability with a CVSS score of 7.5 (HIGH). Redis is an open source, in-memory database that persists on disk. In affected versions specially crafted Lua scripts executing in Redis can cause the heap-based Lua stack to be overflowed, due to inc...
How severe is CVE-2021-32626?
CVE-2021-32626 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-32626?
Check the references section above for vendor advisories and patch information. Affected products include: Redis Redis, Fedoraproject Fedora, Netapp Management Services For Element Software, Netapp Management Services For Netapp Hci, Debian Debian Linux.