CVE-2021-32626
Publication date 4 October 2021
Last updated 24 July 2024
Ubuntu priority
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| redis | 24.10 oracular |
Not affected
|
| 24.04 LTS noble |
Not affected
|
|
| 22.04 LTS jammy |
Not affected
|
|
| 20.04 LTS focal |
Fixed 5:5.0.7-2ubuntu0.1+esm1
|
|
| 18.04 LTS bionic |
Fixed 5:4.0.9-1ubuntu0.2+esm3
|
|
| 16.04 LTS xenial |
Fixed 2:3.0.6-1ubuntu0.4+esm1
|
|
| 14.04 LTS trusty |
Fixed 2:2.8.4-2ubuntu0.2+esm2
|
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Get Ubuntu ProSeverity score breakdown
| Parameter | Value |
|---|---|
| Base score |
8.8 · High
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-5221-1
- Redis vulnerabilities
- 3 August 2022