DescriptionRedis is an open source, in-memory database that persists on disk. When parsing an incoming Redis Standard Protocol (RESP) request, Redis allocates memory according to user-specified values which determine the number of elements (in the multi-bulk header) and size of each element (in the bulk header). An attacker delivering specially crafted requests over multiple connections can cause the server to allocate significant amount of memory. Because the same parsing mechanism is used to handle authentication requests, this vulnerability can also be exploited by unauthenticated users. The problem is fixed in Redis versions 6.2.6, 6.0.16 and 5.0.14. An additional workaround to mitigate this problem without patching the redis-server executable is to block access to prevent unauthenticated users from connecting to Redis. This can be done in different ways: Using network access control tools like firewalls, iptables, security groups, etc. or Enabling TLS and requiring users to authenticate using client side certificates.
Overall state of this security issue: Resolved
This issue is currently rated as having important severity.
|National Vulnerability Database|
|National Vulnerability Database||SUSE|
- SUSE-SU-2021:3772-1, published Tue Nov 23 20:17:52 UTC 2021
- openSUSE-SU-2021:3772-1, published Wed Nov 24 03:43:10 2021
List of released packages
|Product(s)||Fixed package version(s)||References|
|SUSE Linux Enterprise Module for Server Applications 15 SP2|| ||Patchnames: |
|SUSE Linux Enterprise Module for Server Applications 15 SP3|| ||Patchnames: |
|openSUSE Leap 15.3|| ||Patchnames: |
|openSUSE Tumbleweed|| ||Patchnames: |
openSUSE Tumbleweed GA redis-6.2.6-1.1
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.
|SUSE Linux Enterprise Module for Server Applications 15 SP2||redis||Released|
|SUSE Linux Enterprise Module for Server Applications 15 SP3||redis||Released|