Vulnerability Description
Redis is an open source, in-memory database that persists on disk. An integer overflow bug in the underlying string library can be used to corrupt the heap and potentially result with denial of service or remote code execution. The vulnerability involves changing the default proto-max-bulk-len configuration parameter to a very large value and constructing specially crafted network payloads or commands. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. An additional workaround to mitigate the problem without patching the redis-server executable is to prevent users from modifying the proto-max-bulk-len configuration parameter. This can be done using ACL to restrict unprivileged users from using the CONFIG SET command.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Redis | Redis | >= 5.0.0, < 5.0.14 |
| Fedoraproject | Fedora | 33 |
| Debian | Debian Linux | 10.0 |
| Netapp | Management Services For Element Software And Netapp Hci | - |
| Oracle | Communications Operations Monitor | 4.3 |
Related Weaknesses (CWE)
References
- https://github.com/redis/redis/commit/c6ad876774f3cc11e32681ea02a2eead00f2c521PatchThird Party Advisory
- https://github.com/redis/redis/security/advisories/GHSA-j3cr-9h5g-6cphThird Party Advisory
- 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/c6ad876774f3cc11e32681ea02a2eead00f2c521PatchThird Party Advisory
- https://github.com/redis/redis/security/advisories/GHSA-j3cr-9h5g-6cphThird Party Advisory
- 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
FAQ
What is CVE-2021-41099?
CVE-2021-41099 is a vulnerability with a CVSS score of 7.5 (HIGH). Redis is an open source, in-memory database that persists on disk. An integer overflow bug in the underlying string library can be used to corrupt the heap and potentially result with denial of servic...
How severe is CVE-2021-41099?
CVE-2021-41099 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-2021-41099?
Check the references section above for vendor advisories and patch information. Affected products include: Redis Redis, Fedoraproject Fedora, Debian Debian Linux, Netapp Management Services For Element Software And Netapp Hci, Oracle Communications Operations Monitor.