CVE-2021-41099
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.
How to fix
- redis redis5.0.14, 6.0.16, 6.2.6 or later
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VL5KXFN3ATM7IIM7Q4O4PWTSRGZ5744Z/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HTYQ5ZF37HNGTZWVNJD3VXP7I6MEEF42/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WR5WKJWXD4D6S3DJCZ56V74ESLTDQRAB/
- debian.org/security/2021/dsa-5001
- security.gentoo.org/glsa/202209-17
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redis redis | 5.0.0 ≤ v < 5.0.14, 6.0.0 ≤ v < 6.0.16, 6.2.0 ≤ v < 6.2.6 | 5.0.14, 6.0.16, 6.2.6 |
| fedoraproject fedora | 33, 34, 35 | — |
| debian debian_linux | 10.0, 11.0 | — |
| netapp management_services_for_element_software_and_netapp_hci | No range specified | — |
| oracle communications_operations_monitor | 4.3, 4.4, 5.0 | — |
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